Sample records for airport pavement test

  1. Saw & seal, airport pavement.

    DOT National Transportation Integrated Search

    2009-05-01

    Due to extreme cold temperatures, hot bituminous pavements on Maines airports are subject to transverse : or thermal cracking. This can lead to poorly performing pavement structure causing heaving and : settlement problems. Studies have shown that...

  2. Airport pavement marking evaluation for reducing runway incursion

    DOT National Transportation Integrated Search

    2001-02-01

    This study was undertaken to evaluate the widening of airport pavement marking in order to enhance their recognition. Results of this evaluation are aimed at reducing the potential of runway incursions and incidents by making airports pavement markin...

  3. Use of Ground Penetrating Radar at the FAA's National Airport Pavement Test Facility

    NASA Astrophysics Data System (ADS)

    Injun, Song

    2015-04-01

    The Federal Aviation Administration (FAA) in the United States has used a ground-coupled Ground Penetrating Radar (GPR) at the National Airport Pavement Test Facility (NAPTF) since 2005. One of the primary objectives of the testing at the facility is to provide full-scale pavement response and failure information for use in airplane landing gear design and configuration studies. During the traffic testing at the facility, a GSSI GPR system was used to develop new procedures for monitoring Hot Mix Asphalt (HMA) pavement density changes that is directly related to pavement failure. After reviewing current setups for data acquisition software and procedures for identifying different pavement layers, dielectric constant and pavement thickness were selected as dominant parameters controlling HMA properties provided by GPR. A new methodology showing HMA density changes in terms of dielectric constant variations, called dielectric sweep test, was developed and applied in full-scale pavement test. The dielectric constant changes were successfully monitored with increasing airplane traffic numbers. The changes were compared to pavement performance data (permanent deformation). The measured dielectric constants based on the known HMA thicknesses were also compared with computed dielectric constants using an equation from ASTM D4748-98 Standard Test Method for Determining the Thickness of Bound Pavement Layers Using Short-Pulse Radar. Six inches diameter cylindrical cores were taken after construction and traffic testing for the HMA layer bulk specific gravity. The measured bulk specific gravity was also compared to monitor HMA density changes caused by aircraft traffic conditions. Additionally this presentation will review the applications of the FAA's ground-coupled GPR on embedded rebar identification in concrete pavement, sewer pipes in soil, and gage identifications in 3D plots.

  4. Airport manager's guide for the maintenance of asphalt pavements of general aviation airports.

    DOT National Transportation Integrated Search

    2009-01-01

    Hot asphalt pavement (HAP) is used as a surface material on many General Aviation : (GA) airports in California. Currently there are 251 public use airports in California. An : understanding of the proper design, construction and maintenance of the h...

  5. Unified methodology for airport pavement analysis and design. Vol. 1, state of the art

    DOT National Transportation Integrated Search

    1991-06-01

    This report presents an assessment of the state of the art of airport pavement analysis : and design. The objective is to identify those areas in current airport pavement : analysis methodology that need to be substantially improved from the perspect...

  6. AN OPTIMAL MAINTENANCE MANAGEMENT MODEL FOR AIRPORT CONCRETE PAVEMENT

    NASA Astrophysics Data System (ADS)

    Shimomura, Taizo; Fujimori, Yuji; Kaito, Kiyoyuki; Obama, Kengo; Kobayashi, Kiyoshi

    In this paper, an optimal management model is formulated for the performance-based rehabilitation/maintenance contract for airport concrete pavement, whereby two types of life cycle cost risks, i.e., ground consolidation risk and concrete depreciation risk, are explicitly considered. The non-homogenous Markov chain model is formulated to represent the deterioration processes of concrete pavement which are conditional upon the ground consolidation processes. The optimal non-homogenous Markov decision model with multiple types of risk is presented to design the optimal rehabilitation/maintenance plans. And the methodology to revise the optimal rehabilitation/maintenance plans based upon the monitoring data by the Bayesian up-to-dating rules. The validity of the methodology presented in this paper is examined based upon the case studies carried out for the H airport.

  7. Friction evaluation of concrete paver blocks for airport pavement applications

    NASA Technical Reports Server (NTRS)

    Yager, Thomas J.

    1992-01-01

    The development and use of concrete paver blocks is reviewed and some general specifications for application of this type of pavement surface at airport facilities are given. Two different shapes of interlocking concrete paver blocks installed in the track surface at NASA Langley's Aircraft Landing Dynamics Facility (ALDF) are described. Preliminary cornering performance results from testing of 40 x 14 radial-belted and bias-ply aircraft tires are reviewed. These tire tests are part of a larger, ongoing joint NASA/FAA/Industry Surface Traction and Radial Tire (START) Program involving several different tire sizes. Both dry and wet surface conditions were evaluated on the two concrete paver block test surfaces and a conventional, nongrooved Portland cement concrete surface. Future test plans involving evaluation of other concrete paver block designs at the ALDF are indicated.

  8. Implementation of a pavement management system for Virginia's general aviation airports : final report.

    DOT National Transportation Integrated Search

    1990-01-01

    This report summarizes the activities undertaken to implement a pavement management system at 56 general aviation airports coming under the jurisdiction of the Virginia Department of Aviation (VDOAV). The system, which is called Micro-PAVER, is a pro...

  9. Aquatic toxicity of airfield-pavement deicer materials and implications for airport runoff.

    PubMed

    Corsi, Steven R; Geis, Steven W; Bowman, George; Failey, Greg G; Rutter, Troy D

    2009-01-01

    Concentrations of airfield-pavement deicer materials (PDM) in a study of airport runoff often exceeded levels of concern regarding aquatic toxicity. Toxicity tests on Vibrio fischeri, Pimephales promelas, Ceriodaphnia dubia, and Pseudokirchneriella subcapitata (commonly known as Selenastrum capricornutum) were performed with potassium acetate (K-Ac) PDM, sodium formate (Na-For) PDM, and with freezing-point depressants (K-Ac and Na-For). Results indicate that toxicity in PDM is driven by the freezing-point depressants in all tests except the Vibrio fisheri test for Na-For PDM which is influenced by an additive. Acute toxicity end points for different organisms ranged from 298 to 6560 mg/L (as acetate) for K-Ac PDM and from 1780 to 4130 mg/L (as formate) for Na-For PDM. Chronic toxicity end points ranged from 19.9 to 336 mg/L (as acetate) for K-Ac PDM and from 584 to 1670 mg/L (as formate) for Na-For PDM. Sample results from outfalls at General Mitchell International Airport in Milwaukee, WI (GMIA) indicated that 40% of samples had concentrations greater thanthe aquatic-life benchmarkfor K-Ac PDM. K-Ac has replaced urea during the 1990s as the most widely used PDM at GMIA and in the United States. Results of ammonia samples from airport outfalls during periods when urea-based PDM was used at GMIA indicated that 41% of samples had concentrations exceeding the U.S. Environmental Protection Agency (USEPA) 1-h water-quality criterion. The USEPA 1-h water-quality criterion for chloride was exceeded in 68% of samples collected in the receiving stream, a result of road-salt runoff from urban influence near the airport. Results demonstrate that PDM must be considered to comprehensively evaluate the impact of chemical deicers on aquatic toxicity in water containing airport runoff.

  10. Aquatic toxicity of airfield-pavement deicer materials and implications for airport runoff

    USGS Publications Warehouse

    Corsi, S.R.; Geis, S.W.; Bowman, G.; Failey, G.G.; Rutter, T.D.

    2009-01-01

    Concentrations of airfield-pavement deicer materials (PDM) in a study of airport runoff often exceeded levels of concern regarding aquatic toxicity. Toxicity tests on Vibrio fischeri, Pimephales promelas, Ceriodaphnia dubia, and Pseudokirchneriella subcapitata (commonly known as Selenastrum capricornutum) were performed with potassium acetate (K-Ac) PDM, sodium formate (Na-For) PDM, and with freezing- point depressants (K-Ac and Na-For). Results indicate that toxicity in PDM is driven by the freezing-point depressants in all tests except the Vibrio fisheri test for Na-For PDM which is influenced by an additive. Acute toxicity end points for different organisms ranged from 298 to 6560 mg/L (as acetate) for K-Ac PDM and from 1780 to 4130 mg/L (as formate) for Na- For PDM. Chronic toxicity end points ranged from 19.9 to 336 mg/L (as acetate) for K-Ac PDM and from 584 to 1670 mg/L (as formate) for Na-For PDM. Sample results from outfalls at General Mitchell International Airport in Milwaukee, Wl (GMIA) indicated that 40% of samples had concentrations greater than the aquatic-life benchmark for K-Ac PDM. K-Ac has replaced urea during the 1990s as the most widely used PDM at GMIA and in the United States. Results of ammonia samples from airport outfalls during periods when urea-based PDM was used at GMIA indicated that41% of samples had concentrations exceeding the U.S. Environmental Protection Agency (USEPA) 1 -h water-quality criterion. The USEPA 1-h water-quality criterion for chloride was exceeded in 68% of samples collected in the receiving stream, a result of road-salt runoff from urban influence near the airport. Results demonstrate that PDM must be considered to comprehensively evaluate the impact of chemical deicers on aquatic toxicity in water containing airport runoff. ?? 2009 American Chemical Society.

  11. Design of Airport Pavements for Expansive Soils.

    DTIC Science & Technology

    1981-01-01

    8217. . C.Iqt N. - DOT 7 "//-;-31/2I...... , _Ai --i/ 6Z/ ,d, ,-,,’/Design of Airport Pavements for Expansive Soils. JanLapy 1981 6. Per.omingOvgn,, en Code...L/)- V) 3 00L C)- LO en id ’NUN 51J. filter paper (next to the top of the sample) was used as the measure of soil suction. The second filter paper...8217 SITE 4 2 2 3 4 SUCTION, pF FIGURE 4-18. VARIATION OF SUCTION DURING RECHARGE AT DFW. 69 lij ’I41d3U IJ 6id3a LhLO U.. to U.. C.-9 en C, 00 ’U- LA jto

  12. Field Performance of Fiber-Reinforced Concrete Airfield Pavements.

    DTIC Science & Technology

    1986-07-01

    were less severe at some fiver-reinforced concrete pavements at JFK airport in New York than at some of the other airports. The pavements at JFK ... airport did use a poly- ethylene sheet as a bond breaker between the fiber-reinforced overlay and base pavement. This may have helped reduce frictional

  13. Pavement Technology and Airport Infrastructure Expansion Impact

    NASA Astrophysics Data System (ADS)

    Sabib; Setiawan, M. I.; Kurniasih, N.; Ahmar, A. S.; Hasyim, C.

    2018-01-01

    This research aims for analyzing construction and infrastructure development activities potential contribution towards Airport Performance. This research is correlation study with variable research that includes Airport Performance as X variable and construction and infrastructure development activities as Y variable. The population in this research is 148 airports in Indonesia. The sampling technique uses total sampling, which means 148 airports that becomes the population unit then all of it become samples. The results of coefficient correlation (R) test showed that construction and infrastructure development activities variable have a relatively strong relationship with Airport Performance variable, but the value of Adjusted R Square shows that an increase in the construction and infrastructure development activities is influenced by factor other than Airport Performance.

  14. Performance of Cracked and Seated Rigid Airport Pavements.

    DTIC Science & Technology

    1987-04-01

    situ properties of the cracked PCC material and of the uncracked PCC. Additionally, a visual condition survey of the pavements under investigation was...the overall pavement evaluation effort. Results of the NDT testing program were used to determine the in-situ properties of the cracked PCC material ...combined with the NDT deflection basin slopes, led to the conclusion that the cracked and seated PCC layer is behaving as a semi-rigid material . 45 OVERLAY

  15. Use of Terrestrial Laser Scanner for Rigid Airport Pavement Management

    PubMed Central

    Di Benedetto, Alessandro; Fiani, Margherita

    2017-01-01

    The evaluation of the structural efficiency of airport infrastructures is a complex task. Faulting is one of the most important indicators of rigid pavement performance. The aim of our study is to provide a new method for faulting detection and computation on jointed concrete pavements. Nowadays, the assessment of faulting is performed with the use of laborious and time-consuming measurements that strongly hinder aircraft traffic. We proposed a field procedure for Terrestrial Laser Scanner data acquisition and a computation flow chart in order to identify and quantify the fault size at each joint of apron slabs. The total point cloud has been used to compute the least square plane fitting those points. The best-fit plane for each slab has been computed too. The attitude of each slab plane with respect to both the adjacent ones and the apron reference plane has been determined by the normal vectors to the surfaces. Faulting has been evaluated as the difference in elevation between the slab planes along chosen sections. For a more accurate evaluation of the faulting value, we have then considered a few strips of data covering rectangular areas of different sizes across the joints. The accuracy of the estimated quantities has been computed too. PMID:29278386

  16. Use of Terrestrial Laser Scanner for Rigid Airport Pavement Management.

    PubMed

    Barbarella, Maurizio; D'Amico, Fabrizio; De Blasiis, Maria Rosaria; Di Benedetto, Alessandro; Fiani, Margherita

    2017-12-26

    The evaluation of the structural efficiency of airport infrastructures is a complex task. Faulting is one of the most important indicators of rigid pavement performance. The aim of our study is to provide a new method for faulting detection and computation on jointed concrete pavements. Nowadays, the assessment of faulting is performed with the use of laborious and time-consuming measurements that strongly hinder aircraft traffic. We proposed a field procedure for Terrestrial Laser Scanner data acquisition and a computation flow chart in order to identify and quantify the fault size at each joint of apron slabs. The total point cloud has been used to compute the least square plane fitting those points. The best-fit plane for each slab has been computed too. The attitude of each slab plane with respect to both the adjacent ones and the apron reference plane has been determined by the normal vectors to the surfaces. Faulting has been evaluated as the difference in elevation between the slab planes along chosen sections. For a more accurate evaluation of the faulting value, we have then considered a few strips of data covering rectangular areas of different sizes across the joints. The accuracy of the estimated quantities has been computed too.

  17. Unified Airport Pavement Design and Analysis Concepts Workshops Held in Cambridge, Massachusetts on 16-17 July 1991

    DTIC Science & Technology

    1992-07-01

    researcher but have noa been used extensively for airpor pavemen analysis. Finally, thet are wodels that have been devope in otr egb elds tha c be applied...transportation network . Every year, system demands exceed capacity in many area. The capability of our airports to continually accommodate more operations...ability to produce long-lived pavement systems providing mnaximunm benefit - dollar and non-dollar - to the airpor network . This is the cenutr function

  18. Criteria for asphalt-rubber concrete in civil airport pavements: Mixture design

    NASA Astrophysics Data System (ADS)

    Roberts, F. L.; Lytton, R. L.; Hoyt, D.

    1986-07-01

    A mixture design procedure is developed to allow the use of asphalt-rubber binders in concrete for flexible airport pavement. The asphalt-rubber is produced by reacting asphalt with ground, scrap tire rubber to produce the binder for the asphalt-rubber concrete. Procedures for laboratory preparation of alsphalt-rubber binders using an equipment setup that was found by researchers to produce laboratory binders with similar properties to field processes are included. The rubber-asphalt concrete mixture design procedure includes adjustments to the aggregate gradation to permit space for the rubber particles in the asphalt-rubber binder as well as suggested mixing and compaction temperatures, and compaction efforts. While the procedure was used in the laboratory to successfully produce asphalt-rubber concrete mixtures, it should be evaluated in the field to ensure that consistent results can be achieved in a production environment.

  19. Marginal Aggregates in Flexible Pavements: Field Evaluation

    DOT National Transportation Integrated Search

    1998-04-01

    The purpose of this study was to evaluate the utilization of substandard or marginal aggregates in flexible pavement construction of airport pavements. This investigation was undertaken to evaluate the effects of using lower quality aggregates such a...

  20. Criteria for the Use of Lime-Cement-Flyash on Airport Pavements

    DTIC Science & Technology

    1989-12-01

    conducted in which core sarples were obtained from Newark, Portland, and JFK airports . The samples were tested for modulus of resilience and unconfined...Port Authority of New York and New Jersey to finalize the plans for core removal at Newark and JFK Airports . At the meeting, it was agreed that cores...would be extracted at JFK Airport later that month. Similarly, core extractions would begin at Newark Airport the next day after campletion of the JFK

  1. Evaluation of Precast Panels for Airfield Pavement Repair. Phase 2: Results of Accelerated Pavement Testing

    DTIC Science & Technology

    2013-09-01

    ER D C/ G SL T R -1 3 -2 4 Evaluation of Precast Panels for Airfield Pavement Repair Phase II: Results of Accelerated Pavement Testing...default. ERDC/GSL TR-13-24 September 2013 Evaluation of Precast Panels for Airfield Pavement Repair Phase II: Results of Accelerated Pavement ... pavement testing using a C-17 load cart to evaluate the performance of a precast portland cement concrete (PCC) pavement repair system. The system

  2. Pavement testing facility : effects of tire pressure on flexible pavement response performance

    DOT National Transportation Integrated Search

    1989-08-01

    The effects of tire pressure on flexible pavement response and performance were evaluated using data from the first phase of research at the Federal Highway Administration's Pavement Testing Facility. The Accelerated Loading Facility testing machine ...

  3. Verification of mechanistic-empirical design models for flexible pavements through accelerated pavement testing.

    DOT National Transportation Integrated Search

    2014-08-01

    The Midwest States Accelerated Pavement Testing Pooled Fund Program, financed by the highway : departments of Kansas, Iowa, and Missouri, has supported an accelerated pavement testing (APT) project to : validate several models incorporated in the NCH...

  4. 78 FR 3311 - Safety Enhancements, Certification of Airports

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-01-16

    ... the airport non-movement area, and (5) Requiring certificate holders to conduct pavement surface... (SMGCS). Non-Movement Area Safety Training... YES NO. Runway Pavement Surface Evaluation.. YES NO. In... 139 to host scheduled passenger carrying operations of an air carrier operating aircraft designed for...

  5. Measurement, Construction, and Maintenance of Skid-Resistant Airport Pavement Surfaces

    DOT National Transportation Integrated Search

    1997-03-18

    This advisory circular (AC) contains guidelines and procedures for the design : and construction of skid-resistant pavement, pavement evaluation with friction : measuring equipment, and maintenance of high skid-resistant pavements. 45p.

  6. Verification of mechanistic-empirical design models for flexible pavements through accelerated pavement testing : technical summary.

    DOT National Transportation Integrated Search

    2014-08-01

    Midwest States Accelerated Pavement Testing Pooled-Fund Program, financed by the : highway departments of Kansas, Iowa, and Missouri, has supported an accelerated : pavement testing (APT) project to validate several models incorporated in the NCHRP :...

  7. Commonwealth of Pennsylvania Bureau of Aviation pavement evaluation report : final report, March 2010.

    DOT National Transportation Integrated Search

    2010-03-01

    As part of the Pennsylvania Department of Transportations (PennDOT) airport pavement management efforts, the Bureau of : Aviation (BOA) retained Applied Pavement Technology, Inc. (APTech), assisted by DY Consultants, to evaluate the condition of t...

  8. Improve the quality and service life of water-based pavement marking paints on pavements with high-iron aggregates.

    DOT National Transportation Integrated Search

    2015-08-01

    White pavement paint marking on airport runways was being discolored by rust-like staining. Discoloration is a critical safety : problem because white paint indicates runways and yellow paint is used for taxiways and aircraft parking. When the white ...

  9. Full-Scale Accelerated Testing of Multi-axial Geogrid Stabilized Flexible Pavements

    DTIC Science & Technology

    2017-06-01

    costs and reduced budgets, transportation officials are often tasked with applying innovative solutions to pavement design and construction projects... pavement designers . 1.2 Objective The objective of this effort was to construct and traffic full-scale flexible pavement sections to provide...Development Center (ERDC) constructed the full-scale test section as designed by Tensar under shelter in its Hangar 2 Pavement Test Facility. During

  10. Yeager Airport Hydrogen Vehicle Test Project

    DOE Office of Scientific and Technical Information (OSTI.GOV)

    Davis, Williams

    The scope of this project was changed during the course of the project. Phase I of the project was designed to have the National Alternative Fuels Training Consortium (NAFTC), together with its partners, manage the Hydrogen Vehicle Test Project at the Yeager Airport in conjunction with the Central West Virginia Regional Airport Authority (CWVRAA) in coordination with the United States Department of Energy National Energy Technology Laboratory (U.S. DOE NETL). This program would allow testing and evaluation of the use of hydrogen vehicles in the state of West Virginia utilizing the hydrogen fueling station at Yeager Airport. The NAFTC andmore » CWVRAA to raise awareness and foster a greater understanding of hydrogen fuel and hydrogen-powered vehicles through a targeted utilization and outreach and education effort. After initial implementation of the project, the project added, determine the source(s) of supply for hydrogen powered vehicles that could be used for the testing. After completion of this, testing was begun at Yeager Airport. During the course of the project, the station at Yeager Airport was closed and moved to Morgantown and the West Virginia University Research Corporation. The vehicles were then moved to Morgantown and a vehicle owned by the CWVRAA was purchased to complete the project at the new location. Because of a number of issues detailed in the report for DE-FE0002994 and in this report, this project did not get to evaluate the effectiveness of the vehicles as planned.« less

  11. Denver International Airport sensor processing and database

    DOT National Transportation Integrated Search

    2000-03-01

    Data processing and database design is described for an instrumentation system installed on runway 34R at Denver International Airport (DIA). Static (low-speed) and dynamic (high-speed) sensors are installed in the pavement. The static sensors includ...

  12. Enhancements to pavement marking testing procedures.

    DOT National Transportation Integrated Search

    2010-08-01

    The Oregon Department of Transportation (ODOT) requires performance and durability testing of all pavement : marking materials before they can be applied on construction projects on state highways. Manufacturers apply materials : on a two-year test d...

  13. Airport Pavement Design For The Boeing 777 Airplane

    DOT National Transportation Integrated Search

    1995-10-22

    The purpose of this advisory circular is to provide thickness design standards : for pavements intended to serve the Boeing 777 airplane. A new method of design : based on layered elastic analysis has been developed to calculate design : thickness fo...

  14. Accelerated pavement testing of low-volume paved roads with geocell reinforcement.

    DOT National Transportation Integrated Search

    2015-03-01

    The Midwest States Accelerated Pavement Testing Pooled-Fund Program, financed by the highway : departments of Kansas, Iowa, Missouri, and New York, has supported an accelerated pavement testing (APT) project : to study the rehabilitation of low-volum...

  15. Definition of Research Needs to Address Airport Pavement Distress in Cold Regions

    DTIC Science & Technology

    1989-05-01

    2318 RODNEY A. 03/04/85 ALLIANCE AIRPORT PO DRAWER D ALLIANCE NE 69301 ACE NC BAUER 308-762-5400 WOLFGANG 03/25/85 HALL COUNTY REGIONAL AIRPORT ROUTE 3...NW WINTER 206-346-7380 JEFF 03/05/85 SEA-TAC INT’L. AIRPORT SEATTLE WA 98188 ANN MW KRAUSE 206-433-5410 ART 03/05/85 GRANT COUNTY AIRPORT TERMINAL

  16. Accelerated testing for studying pavement design and performance (FY 2003) : research summary.

    DOT National Transportation Integrated Search

    2008-01-01

    The Midwest States Accelerated Pavement Testing Pooled Fund Program, financed by : the highway departments of Missouri, Iowa, Kansas and Nebraska, has supported an : accelerated pavement testing (APT) project to compare the performance of stabilized ...

  17. Multimodal approach to seismic pavement testing

    USGS Publications Warehouse

    Ryden, N.; Park, C.B.; Ulriksen, P.; Miller, R.D.

    2004-01-01

    A multimodal approach to nondestructive seismic pavement testing is described. The presented approach is based on multichannel analysis of all types of seismic waves propagating along the surface of the pavement. The multichannel data acquisition method is replaced by multichannel simulation with one receiver. This method uses only one accelerometer-receiver and a light hammer-source, to generate a synthetic receiver array. This data acquisition technique is made possible through careful triggering of the source and results in such simplification of the technique that it is made generally available. Multiple dispersion curves are automatically and objectively extracted using the multichannel analysis of surface waves processing scheme, which is described. Resulting dispersion curves in the high frequency range match with theoretical Lamb waves in a free plate. At lower frequencies there are several branches of dispersion curves corresponding to the lower layers of different stiffness in the pavement system. The observed behavior of multimodal dispersion curves is in agreement with theory, which has been validated through both numerical modeling and the transfer matrix method, by solving for complex wave numbers. ?? ASCE / JUNE 2004.

  18. Evaluation of acceptance strength tests for concrete pavements.

    DOT National Transportation Integrated Search

    2005-06-30

    The North Carolina Department of Transportation has used traditionally flexural strength tests for acceptance : testing of Portland cement concrete pavements. This report summarizes a research project implemented to : investigate the feasibility of u...

  19. Airport testing an explosives detection portal

    DOE Office of Scientific and Technical Information (OSTI.GOV)

    Rhykerd, C.; Linker, K.; Hannum, D.

    1998-08-01

    At the direction of the US Congress, following the Pan Am 103 and TWA 800 crashes, the Federal Aviation Administration funded development of non-invasive techniques to screen airline passengers for explosives. Such an explosives detection portal, developed at Sandia National Laboratories, was field tested at the Albuquerque International airport in September 1997. During the 2-week field trial, 2,400 passengers were screened and 500 surveyed. Throughput, reliability, maintenance and sensitivity were studied. Follow-up testing at Sandia and at Idaho National Engineering and Environmental Laboratory was conducted. A passenger stands in the portal for five seconds while overhead fans blow air overmore » his body. Any explosive vapors or dislodged particles are collected in vents at the feet. Explosives are removed from the air in a preconcentrator and subsequently directed into an ion mobility spectrometer for detection. Throughput measured 300 passengers per hour. The non-invasive portal can detect subfingerprint levels of explosives residue on clothing. A survey of 500 passengers showed a 97% approval rating, with 99% stating that such portals, if effective, should be installed in airports to improve security. Results of the airport test, as well as operational issues, are discussed.« less

  20. Evaluation of Geosynthetic-Reinforced Flexible Pavements using Static Plate Load Tests

    DOT National Transportation Integrated Search

    2010-01-01

    This study focuses on the response of full-scale geogrid-reinforced flexible pavements to static surface loading. Specifically, static plate load (SPL) tests were performed on a low-volume, asphalt pavement frontage road in Eastern Arkansas, USA (the...

  1. 76 FR 67018 - Notice to Manufacturers of Airport In-Pavement Stationary Runway Weather Information Systems

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-10-28

    ...-Pavement Stationary Runway Weather Information Systems AGENCY: Federal Aviation Administration (FAA), U.S. DOT. ACTION: Notice to Manufacturers of In-Pavement Stationary Runway Weather Information Systems... waivers to foreign manufacturers of Active or Passive In- Pavement Stationary Runway Weather Information...

  2. Accelerated pavement testing of low-volume paved roads with geocell reinforcement : [technical summary].

    DOT National Transportation Integrated Search

    2015-03-01

    The Midwest States Accelerated Pavement Testing Pooled-Fund Program, financed : by the highway departments of Kansas, Iowa, Missouri, and New York, has : supported an accelerated pavement testing (APT) project to study the rehabilitation : of low-vol...

  3. Assessing cryogenic testing of aggregates for concrete pavements

    DOT National Transportation Integrated Search

    1995-02-01

    Damage to concrete pavements caused by freeze-thaw deterioration of concrete aggregate remains a serious problem. Current tests for determining an aggregate's freeze-thaw durability can take up to 70 days to perform and results from these tests don't...

  4. Development of a Rolling Dynamic Deflectometer for Continuous Deflection Testing of Pavements

    DOT National Transportation Integrated Search

    1998-05-01

    A rolling dynamic deflectometer (RDD) was developed as a nondestructive method for determining continuous deflection profiles of pavements. Unlike other commonly used pavement testing methods, the RDD performs continuous rather than discrete measurem...

  5. Mechanistic interpretation of nondestructive pavement testing deflections

    NASA Astrophysics Data System (ADS)

    Hoffman, M. S.; Thompson, M. R.

    1981-06-01

    A method for the back calculation of material properties in flexible pavements based on the interpretation of surface deflection measurements is proposed. The ILLI-PAVE, a stress-dependent finite element pavement model, was used to generate data for developing algorithms and nomographs for deflection basin interpretation. Twenty four different flexible pavement sections throughout the State of Illinois were studied. Deflections were measured and loading mode effects on pavement response were investigated. The factors controlling the pavement response to different loading modes are identified and explained. Correlations between different devices are developed. The back calculated parameters derived from the proposed evaluation procedure can be used as inputs for asphalt concrete overlay design.

  6. Accelerated Performance Testing on the 2006 NCAT Pavement Test Track

    DOT National Transportation Integrated Search

    2009-12-01

    The original National Center for Asphalt Technology (NCAT) Pavement Test Track was built in 2000 in Opelika, Alabama where it has served as a state-of-the-art, full-scale, closed-loop accelerated loading facility. The construction, operation, and res...

  7. Analysis of pavement response data and use of nondestructive testing for improving pavement design.

    DOT National Transportation Integrated Search

    2006-08-01

    The first fully instrumented flexible pavement test section in Maine was constructed in Fall, 2005. This paper presents : the description of the instruments, their installation, and analysis of temperature and stress-strain data collected so far. : T...

  8. Testing of materials from the Minnesota Cold Regions pavement research test facility

    DOT National Transportation Integrated Search

    1996-09-01

    The U.S. Army Cold Regions Research and Engineering Laboratory (CRREL) conducted various laboratory tests on pavement materials from the Mn/ ROAD facility. The tests helped to characterize the behavior of materials under season frost conditions, and ...

  9. Longitudinal Joint Systems in Slip-Formed Rigid Pavements. Volume IV. Recommendations for Alternate Joint Systems and for Strengthening Existing Joints.

    DTIC Science & Technology

    1981-11-01

    34Structural Analysis of Concrete Pavement Systems," Journal, ASCE, Vol. 106, No. TE5, September 1980. 6. Barenberg, E. J., and Arntzen , D. M., "Design of...International Airport," Unpublished Report, Consultant Brandley to SEA-TAC Airport Authority, December 1971. 8. Personal Observation by Author. 9. Arntzen , D

  10. Case Studies on Application of Data Integration Techniques to Nondestructive Testing of Pavements

    DOT National Transportation Integrated Search

    2005-11-01

    The nondestructive testing devices currently in use by TxDOT are the falling weight deflectometer, the seismic pavement analyzer, the portable seismic pavement analyzer, and ground penetrating radar, which provide thickness or modulus information. In...

  11. Laboratory pavement polishing device (wear machine) versus field friction test units and accumulative traffic (ADT). Phase 2. Correlation study

    NASA Astrophysics Data System (ADS)

    Godwin, H. F.; Loyed, D. B.; Miley, W. G.; Page, G. C.

    1981-04-01

    The degree to which pavement wear (vehicular traffic) could be predicted from testing samples of in-service pavements in the laboratory pavement polishing device was determined. This investigation was made on asphaltic concrete pavements, primarily friction courses used in Florida. These pavements were tested at different levels of accumulative traffic (ADT) for approximately 2 years.

  12. Development of Acceptance Plans for Airport Pavement Materials. Volume 1. Development

    DTIC Science & Technology

    1990-05-01

    Robert A. Bacza Mr. Kenneth P. Knoll Mr. Timothy Dyer Mr. John Moretto 04/08/87 Harrisburg ADO Mr. Dan Cassidy Mr. Fred Waldmer *04/10/87 Beckley AFO... Hoyle , Tanner & Associates, Inc., Bedford, NH *06/24/87 Calcerinos-Spina, Liverpool, NY *06/25/87 Nigara Frontier Transportation Authority, Buffalo, NY...VA; Suffolk Municipal Airport, Suffolk, VA. 13. Hoyle , Tanner & Asociates, Inc., Bedford, NH, Barry W. Lussier; East Hampton Airport, East Hampton, NY

  13. Modeling of Mn/Road test sections with the CRREL mechanistic pavement design procedure

    DOT National Transportation Integrated Search

    1996-09-01

    The U.S. Army Cold Regions Research and Engineering Laboratory is developing a mechanistic pavement design procedure for use in seasonal frost areas. The procedure was used to predict pavement performance of some test sections under construction at t...

  14. Environmental assessment of airport pavement design and construction alternatives : final report.

    DOT National Transportation Integrated Search

    2016-02-01

    The objective of this study is to quantify energy and environmental sustainability of asphalt and concrete : runway pavements using Life-Cycle Assessment (LCA). The design alternatives include runway rehabilitation/reconstruction : designs considered...

  15. Highway pavement performance test for colored thin anti-skidding layers

    NASA Astrophysics Data System (ADS)

    Gao, Wei; Cui, Wei; Xu, Ming

    2018-03-01

    Based on the actual service condition of highway pavement colored thin anti-skidding layers, with materials of color quartz sand and two-component acrylic resin as basis, we designed such tests as the bond strength, shearing strength, tear strength, fatigue performance and aggregate polished value, and included the freeze-thaw cycle and de-icing salt and other factors in the experiment, connecting with the climate characteristics of circumpolar latitude and low altitude in Heilongjiang province. Through the pavement performance test, it is confirmed that the colored thin anti-skidding layers can adapt to cold and humid climate conditions, and its physical mechanical properties are good.

  16. Vortex Sensing Tests at Logan and Kennedy Airports

    DOT National Transportation Integrated Search

    1972-12-01

    The report describes a series of tests of wake vortex sensing systems at Logan and Kennedy Airports. Two systems, a pulsed acoustic radar (acdar) and an array of ground level pressure sensors, were tested. Site restrictions limited the Logan work to ...

  17. Accelerated load testing of geosynthetic base reinforced pavement test sections.

    DOT National Transportation Integrated Search

    2011-02-01

    The main objective of this research is to evaluate the benefits of geosynthetic stabilization and reinforcement of subgrade/base aggregate layers in flexible pavements built on weak subgrades and the effect of pre-rut pavement sections, prior to the ...

  18. Long-term pavement performance project laboratory materials testing and handling guide

    DOT National Transportation Integrated Search

    2007-09-01

    The Long Term Pavement Performance (LTPP) Laboratory Material Testing Guide was originally prepared for laboratory material handling and testing of material specimens and samples of asphalt materials, portland cement concrete, aggregates, and soils u...

  19. Certification Tests on Cold Patch Asphalt Repair Materials for Use in Airfield Pavements

    DTIC Science & Technology

    2010-06-01

    in Airfield Pavements Mariely Mejías-Santiago, Franciso del Valle Roldán, and Lucy P. Priddy Geotechnical and Structures Laboratory U.S. Army...28 Figure 19. Pavement structure in the test section...ERDC), Geotechnical and Structures Laboratory (GSL), Vicksburg, MS. The findings and recommendations presented in this report are based upon laboratory

  20. Evaluation of various hot mix asphalt pavement thicknesses over rubblized concrete pavement.

    DOT National Transportation Integrated Search

    2011-07-01

    In 1999, the Wisconsin DOT constructed two test sections as part of a rubblized PCC pavement project on I-39 to evaluate whether : increased HMA thickness could extend the pavement system's service life. Design thicknesses of the control and test sec...

  1. 77 FR 38705 - Draft Specification for Airport Light Bases, Transformer Housings, Junction Boxes, and...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-06-28

    ..., Transformer Housings, Junction Boxes, and Accessories Airport Design'' Advisory Circular, AC 150/5345-42G. The... necessary to carry out this subchapter and regulations to be assumed by the sponsor. Uniform design... A307-A) per Engineering Brief (EB) 83, In-Pavement Light Fixture Bolts is introduced where applicable...

  2. Comparison study on flexible pavement design using FAA (Federal Aviation Administration) and LCN (Load Classification Number) code in Ahmad Yani international airport’s runway

    NASA Astrophysics Data System (ADS)

    Santoso, S. E.; Sulistiono, D.; Mawardi, A. F.

    2017-11-01

    FAA code for airport design has been broadly used by Indonesian Ministry of Aviation since decades ago. However, there is not much comprehensive study about its relevance and efficiency towards current situation in Indonesia. Therefore, a further comparison study on flexible pavement design for airport runway using comparable method has become essential. The main focus of this study is to compare which method between FAA and LCN that offer the most efficient and effective way in runway pavement planning. The comparative methods in this study mainly use the variety of variable approach. FAA code for instance, will use the approach on the aircraft’s maximum take-off weight and annual departure. Whilst LCN code use the variable of equivalent single wheel load and tire pressure. Based on the variables mentioned above, a further classification and rated method will be used to determine which code is best implemented. According to the analysis, it is clear that FAA method is the most effective way to plan runway design in Indonesia with consecutively total pavement thickness of 127cm and LCN method total pavement thickness of 70cm. Although, FAA total pavement is thicker that LCN its relevance towards sustainable and pristine condition in the future has become an essential aspect to consider in design and planning.

  3. Resilient modulus of freeze-thaw affected granular soils for pavement design and evaluation. Part 4: Field validation tests at Albany County Airport

    NASA Astrophysics Data System (ADS)

    Johnson, T. C.; Crowe, A.; Erickson, M.; Cole, D. M.

    1986-10-01

    Stress-deformation data for unbound base, subbase, and silty sand subgrade soils in two airfield pavements were obtained from in situ tests and laboratory tests. Surface deflections were measured in the in situ tests, with a falling-weight deflectometer, when the soils were frozen, thawed, and at various stages of recovery from thaw weakening. The measured deflections were used to judge the validity of procedures developed for laboratory triaxial tests to determine nonlinear resilient moduli of specimens in the frozen, thawed and recovering states. The validity of the nonlinear resilient moduli, expressed as functions of externally applied stress and moisture tension, was confirmed by using the expressions to calculate surface deflections that were found to compare well with deflections measured in the in situ tests. The tests on specimens at various stages of recovery are especially significant because they show a strong dependence of the resilient modulus on moisture tension, leading to the conclusion that predictions or in situ measurements of moisture tension can be used to evaluate expected seasonal variation in the resilient modulus of granular soils.

  4. Determination of mechanical properties of materials used in WAY-30 test pavements : executive summary report.

    DOT National Transportation Integrated Search

    2010-05-01

    ODOT selected a relocation of US Route 30 near Wooster : in Wayne County, the WAY-30 project, as the site for : testing long life pavements. The eastbound lanes were : constructed with a long-life Portland Cement Concrete : (PCC) pavement, and the we...

  5. Performance trends of rehabilitated AC pavements

    DOT National Transportation Integrated Search

    2000-10-01

    The General Pavement Study (GPS) 6 experiment, "AC Overlay of AC Pavements," involves pavement test sections where an asphalt concrete (AC) overlay was placed on an existing AC pavement. This TechBrief summarizes the results of a study of the GPS-6 e...

  6. Improving safety in pavement field testing [project summary].

    DOT National Transportation Integrated Search

    2017-09-01

    As part of its pavement evaluation program, the Florida Department of Transportation drives over 500,000 miles annually in its mission to collect pavement condition and performance data. Some of this work is conducted by vehicles that often travel at...

  7. Possibilities of ground penetrating radar usage within acceptance tests of rigid pavements

    NASA Astrophysics Data System (ADS)

    Stryk, Josef; Matula, Radek; Pospisil, Karel

    2013-10-01

    Within the road pavement acceptance tests, destructive as well as non-destructive tests of individual road layers are performed to verify the standard requirements. The article describes a method for providing quick, effective and sufficiently accurate measurements of both dowel and tie bar positions in concrete pavements, using a two-channel ground penetrating radar (GPR). Measurements were carried out in laboratory and in-situ conditions. A special hand cart for field measurements, set for the testing requirements, was designed. It was verified that following the correct measuring and assessment method, it is possible to reach accuracy of determining the in-built rebar up to 1 cm in vertical direction and up to 1.5 cm per 11.5 m of measured length in horizontal direction. In the in-situ tests, GPR identification of possible anomalies due to the phase of concrete pavement laying was presented. In the conclusion, a measurement report is mentioned. The standard requirements for the position of dowels and tie bars cover maximum possible deviation of the rebar position from the project documentation in vertical and horizontal direction, maximum deflection of rebar ends to each other, and maximum translation of rebar in the direction of its longitudinal axis.

  8. The use of a non-nuclear density gauge for monitoring the compaction process of asphalt pavement

    NASA Astrophysics Data System (ADS)

    Van den bergh, Wim; Vuye, Cedric; Kara, Patricia; Couscheir, Karolien; Blom, Johan; Van Bouwel, Philippe

    2017-09-01

    The mechanical performance of an asphalt pavement affects its durability - thus carbon footprint. Many parameters contribute to the success of a durable asphalt mix, e.g. material selection, an accurate mix and even the road design in which the asphalt mix quality is quantified. The quality of the asphalt mix, by its mechanical properties, is also related to the compaction degree. However, and specifically for high volume rates, the laying process at the construction site needs an effective method to monitor and adjust immediately the compaction quality before cooling and without damaging the layer, which is now absent. In this paper the use of a non-nuclear density gauge (PQI - Pavement Quality Indicator) is evaluated, based on a site at Brussels Airport. Considering the outcome of the present research, this PQI is advised as a unique tool for continuous density measurements and allow immediate adjustments during compaction, and decreases the number of core drilling for quality control, and as a posteriori asphalt pavement density test where cores are prohibited. The use of PQI could be recommended to be a part of the standard quality control process in the Flemish region.

  9. Airport cleanup rises above problems

    DOE Office of Scientific and Technical Information (OSTI.GOV)

    Pressly, N.; Lucas, B.; Frumer, B.

    Engineers used a treatment combination to improve the in-situ bioremediation system`s efficiency in removing underground fuel leaks at JFK Airport. John F. Kennedy International Airport, in New York City, on Jamaica Bay, has an above-ground storage capacity of about 32 million gallons of jet fuel, which flow through about 50 miles of high-pressure underground pipe to the central terminal area. EAch terminal`s fuel hydrant system was the major source os subsurface contamination at the site. The site is covered by 1 to 1.5 feet of reinforced concrete pavement. Liquid phase jet fuel (free product) was measured on the water tablemore » with true thickness ranging from less than 1 inch to 1 foot. After analysis of core samples, contamination was found adsorbed to the soil with maximum levels at the water table. This article describes the clean up, covering the following topics: microbial conditions during system operation; above-ground treatment challenges: free product emulsification, presence of biomass; evaluation of enhancements: dissolved air floatation, coagulation and flocculation, retention time adjustments; conclusions.« less

  10. Investigation of proposed AASHTO rut test procedure using the Asphalt Pavement Analyzer.

    DOT National Transportation Integrated Search

    2006-01-01

    The Virginia Department of Transportation uses the Asphalt Pavement Analyzer with beam specimens to test and approve asphalt mixtures for rut resistance. Some agencies use cylindrical specimens that impart distinct testing advantages such as the ease...

  11. Application of empirical and mechanistic-empirical pavement design procedures to Mn/ROAD concrete pavement test sections

    DOT National Transportation Integrated Search

    1997-05-01

    Current pavement design procedures are based principally on empirical approaches. The current trend toward developing more mechanistic-empirical type pavement design methods led Minnesota to develop the Minnesota Road Research Project (Mn/ROAD), a lo...

  12. Forensic investigation of pavement distress : Old Airport Road in Bristol, Virginia.

    DOT National Transportation Integrated Search

    2003-01-01

    A few years after Old Airport Road in Bristol, Virginia, was reconstructed, inordinate distortions of remarkable uniformity began to appear in the paved asphalt surface directly above concrete pipe culverts, which were buried beneath and across the r...

  13. Full-Scale Accelerated Pavement Testing of Warm-Mix Asphalt (WMA) for Airfield Pavements

    DTIC Science & Technology

    2014-01-01

    software and Pavement Engineering Utility (PSEVEN) were used 50 ft 65 ft 130 ft 24 ft Item 3 Sasobit ® Item 4 Evotherm 3G Item 1 HMA... Evotherm 3G Air Top Mid-depth Bottom Target temperature = 109 ºF ERDC/GSL TR-14-3 25 The target pavement temperature for this study was 109 ºF, and it is...the locations of the I-buttons and their layout in relation to the vents. 90 95 100 105 110 115 120 HMA Foamed Asphalt Sasobit Evotherm 3G Av er ag e

  14. Long-Term Monitoring of Pavement Maintenance Materials Test Sites

    DOT National Transportation Integrated Search

    1998-06-01

    The Strategic Highway Research Program's {SHRP) H-106 pothole repair experiment was part of the most extensive pavement maintenance experiment ever conducted. Started under SHRP and continued under the Long-Term Pavement Performance program's Long-Te...

  15. Investigation of the Asphalt Pavement Analyzer (APA) testing program in Nebraska.

    DOT National Transportation Integrated Search

    2008-03-01

    The asphalt pavement analyzer (APA) has been widely used to evaluate hot-mix asphalt (HMA) rutting potential in mix : design and quality control-quality assurance (QC-QA) applications, because the APA testing and its data analyses are : relatively si...

  16. Texas flexible pavements and overlays : year 1 report, test sections, data collection, analyses, and data storage system.

    DOT National Transportation Integrated Search

    2012-06-01

    This five-year project was initiated to collect materials and pavement performance data on a minimum of 100 highway test sections around the State of Texas, incorporating both flexible pavements and overlays. Besides being used to calibrate and valid...

  17. Aircraft Wake Vortex Takeoff Tests at Toronto International Airport

    DOT National Transportation Integrated Search

    1979-02-01

    This report describes the collection and analysis of data related to the behavior of the wake vortices of departing aircraft. The test site was located on the departure end of Runway 23L at Toronto International Airport, Toronto, Ontario, Canada. Thr...

  18. Accelerated testing for studying pavement design and performance (FY 2004) : research summary.

    DOT National Transportation Integrated Search

    2009-03-01

    The thirteenth full-scale Accelerated Pavement Test (APT) experiment at the Civil Infrastructure Laboratory (CISL) of Kansas State University aimed to determine the response and the failure mode of thin concrete overlays.

  19. Testing & Evaluation of Close-Range SAR for Monitoring & Automatically Detecting Pavement Conditions

    DOT National Transportation Integrated Search

    2012-01-01

    This report summarizes activities in support of the DOT contract on Testing & Evaluating Close-Range SAR for Monitoring & Automatically Detecting Pavement Conditions & Improve Visual Inspection Procedures. The work of this project was performed by Dr...

  20. Tests of an ATCRBS Based Trilateration Sensor at Logan International Airport

    DOT National Transportation Integrated Search

    1979-11-01

    Field test results of accuracy and coverage for an ATCRBS based surface trilateration sensor at Logan International Airport are described. This sensor was previously tested at NAFEC for feasibility and because of a lack of sufficient aircraft traffic...

  1. Accelerated testing for studying pavement design and performance (FY 2003) : evaluation of the chemical stabilized subgrade soil (CISL Experiment No. 12).

    DOT National Transportation Integrated Search

    2008-01-01

    The Midwest States Accelerated Pavement Testing Pooled Fund Program, financed by the highway departments : of Missouri, Iowa, Kansas and Nebraska, has supported an accelerated pavement testing (APT) project to compare : the performance of stabilized ...

  2. Business Centre Development Model of Airport Area in Supporting Airport Sustainability in Indonesia

    NASA Astrophysics Data System (ADS)

    Setiawan, MI; Surjokusumo, S.; Ma'soem, DM; Johan, J.; Hasyim, C.; Kurniasih, N.; Sukoco, A.; Dhaniarti, I.; Suyono, J.; Sudapet, IN; Nasihien, RD; Mudjanarko, SW; Wulandari, A.; Ahmar, Ansari S.; Wajdi, MBN

    2018-01-01

    Airport is expected to play the role in enhancing the economic level of the region, especially the local people around the airport. The Aero City concept in developing an airport might also develop a city centreed in the airport that combining airport oriented business development, business actors and local people around the airport area. This study aims to generate development model of business centre at the airports in Indonesia. This is a mixed method based study. The population includes 296 airports under government management, government subsidiary and military. By using stratified random sampling, there were 151 sample airports. The results show that business centre development in the airport area will be related with the airport management and the commercial property (business centre) growth at the airport. Aero City in Indonesia can be developed by partnership system between government and private sector that consists of construction, development, and implementation of commercial property such as hotel, apartment, retail, office, etc. Based on the result of T-Value test, Airport Performance variable predicted to have significant influence on Gross Regional Domestic Product Central Business District performance.

  3. Improving safety in pavement field testing.

    DOT National Transportation Integrated Search

    2017-09-15

    The Florida Department of Transportation (FDOT) collects pavement condition and performance data each year, using both site-specific equipment that requires temporary traffic control (TTC) operations (either moving or closed operations) and full-size...

  4. Evaluation of experimental flexible pavements : interim report no. 1, construction of Altavista Bypass experimental pavement.

    DOT National Transportation Integrated Search

    1974-01-01

    Deflection tests conducted during the construction and shortly after the completion of a large experimental pavement project are reported. Four different pavement designs, as follows, are compared: 1. 6-inch cement stabilized subgrade, 6-inch crushed...

  5. Tire/pavement and environmental traffic noise research study : interim report - 2009 testing.

    DOT National Transportation Integrated Search

    2011-01-01

    This research study is being conducted in response to CDOTs interest in traffic noise in general, and the tire/pavement : interaction in particular. Following a rigid set of testing protocols, data is being collected on highway traffic noise : cha...

  6. Design of overlays for flexible pavements based on AASHTO road test data.

    DOT National Transportation Integrated Search

    1978-01-01

    The need for a suitable method of designing the thickness of overlays and predicting the performance of the overlaid pavement has recently been recognized. The AASHTO Road Tests included studies on 99 overlays, but they failed to produce conclusive r...

  7. TigerShark UAS noise flight test at Griffiss Airport : letter report to Dr. Mehmet Marsan

    DOT National Transportation Integrated Search

    2016-05-27

    "This memorandum documents preliminary results of the noise flight test conducted on the Navmar TigerShark UAS at Griffiss International Airport (KRME, http://www.ocgov.net/airport) in Rome, New York on May 17, 2016. This memorandum is intended to pr...

  8. Evaluation of airfield pavement evenness

    NASA Astrophysics Data System (ADS)

    Pietruszewski, Paweł; Poświata, Adam; Wesołowski, Mariusz

    2018-05-01

    The evenness of airfield pavements is one of the basic operating parameters, which characterize them. The evenness determines not only comfort of traffic along an airfield pavement, but also influences the size of dynamic effect on the pavement, hence, the safety of air operations. In addition, the evenness condition changing as a result of dynamic loads, adverse weather conditions or inappropriate airfield pavement construction technology, lead to deviations from the desired condition in the form of longitudinal and transverse unevenness. As a result, systematic and correct performance of tests is a very significant and required factor impacting the improvement of traffic safety on airfield pavements. If the data obtained through the measurements are not sufficiently reliable, they may consequently lead to making incorrect decisions, which can ultimately impact the safety of air operations.

  9. Plastic (wire-combed) grooving of a slip-formed concrete runway overlay at Patrick Henry Airport: An initial evaluation

    NASA Technical Reports Server (NTRS)

    Marlin, E. C.; Horne, W. B.

    1977-01-01

    A wire-comb technique is described for transversely grooving the surface of a freshly laid (plastic state) slip-formed concrete overlay installed at Patrick Henry Airport. This method of surface texturing yields better water drainage and pavement skid resistance than that obtained with an older conventional burlap drag concrete surface treatment installed on an adjacent portion of the runway.

  10. Surface Development and Test Facility (SDTF) New R&D Simulator for Airport Operations

    NASA Technical Reports Server (NTRS)

    Dorighi, Nancy S.

    1997-01-01

    A new simulator, the Surface Development and Test Facility (SDTF) is under construction at the NASA Ames Research Center in Mountain View, California. Jointly funded by the FAA (Federal Aviation Administration) and NASA, the SDTF will be a testbed for airport surface automation technologies of the future. The SDTF will be operational in the third quarter of 1998. The SDTF will combine a virtual tower with simulated ground operations to allow evaluation of new technologies for safety, effectiveness, reliability, and cost benefit. The full-scale level V tower will provide a seamless 360 degree high resolution out-the-window view, and a full complement of ATC (air traffic control) controller positions. The imaging system will be generated by two fully-configured Silicon Graphics Onyx Infinite Reality computers, and will support surface movement of up to 200 aircraft and ground vehicles. The controller positions, displays and consoles can be completely reconfigured to match the unique layout of any individual airport tower. Dedicated areas will accommodate pseudo-airport ramp controllers, pseudo-airport operators, and pseudo-pilots. Up to 33 total personnel positions will be able to participate in simultaneous operational scenarios. A realistic voice communication infrastructure will emulate the intercom and telephone communications of a real airport tower. Multi-channel audio and video recording and a sophisticated data acquisition system will support a wide variety of research and development areas, such as evaluation of automation tools for surface operations, human factors studies, integration of terminal area and airport technologies, and studies of potential airport physical and procedural modifications.

  11. Airport Remote Tower Sensor Systems

    NASA Technical Reports Server (NTRS)

    Papasin, Richard; Gawdiak, Yuri; Maluf, David A.; Leidich, Christopher; Tran, Peter B.

    2001-01-01

    Remote Tower Sensor Systems (RTSS) are proof-of-concept prototypes being developed by NASA/Ames Research Center (NASA/ARC) with collaboration with the FAA (Federal Aviation Administration) and NOAA (National Oceanic Atmospheric Administration). RTSS began with the deployment of an Airport Approach Zone Camera System that includes real-time weather observations at San Francisco International Airport. The goal of this research is to develop, deploy, and demonstrate remotely operated cameras and sensors at several major airport hubs and un-towered airports. RTSS can provide real-time weather observations of airport approach zone. RTSS will integrate and test airport sensor packages that will allow remote access to realtime airport conditions and aircraft status.

  12. Analysis, testing and verification of the behavior of composite pavements under Florida conditions using a heavy vehicle simulator

    NASA Astrophysics Data System (ADS)

    Tapia Gutierrez, Patricio Enrique

    Whitetopping (WT) is a rehabilitation method to resurface deteriorated asphalt pavements. While some of these composite pavements have performed very well carrying heavy load, other have shown poor performance with early cracking. With the objective of analyzing the applicability of WT pavements under Florida conditions, a total of nine full-scale WT test sections were constructed and tested using a Heavy Vehicle Simulator (HVS) in the APT facility at the FDOT Material Research Park. The test sections were instrumented to monitor both strain and temperature. A 3-D finite element model was developed to analyze the WT test sections. The model was calibrated and verified using measured FWD deflections and HVS load-induced strains from the test sections. The model was then used to evaluate the potential performance of these test sections under critical temperature-load condition in Florida. Six of the WT pavement test sections had a bonded concrete-asphalt interface by milling, cleaning and spraying with water the asphalt surface. This method produced excellent bonding at the interface, with shear strength of 195 to 220 psi. Three of the test sections were intended to have an unbonded concrete-asphalt interface by applying a debonding agent in the asphalt surface. However, shear strengths between 119 and 135 psi and a careful analysis of the strain and the temperature data indicated a partial bond condition. The computer model was able to satisfactorily model the behavior of the composite pavement by mainly considering material properties from standard laboratory tests and calibrating the spring elements used to model the interface. Reasonable matches between the measured and the calculated strains were achieved when a temperature-dependent AC elastic modulus was included in the analytical model. The expected numbers of repetitions of the 24-kip single axle loads at critical thermal condition were computed for the nine test sections based on maximum tensile stresses

  13. UTM Technical Capabilities Level 2 (TLC2) Test at Reno-Stead Airport.

    NASA Image and Video Library

    2016-10-06

    Test of Unmanned Aircraft Systems Traffic Management (UTM) technical capability Level 2 (TCL2) at Reno-Stead Airport, Nevada. During the test, five drones simultaneously crossed paths, separated by altitude. Two drones flew beyond visual line-of-sight and three flew within line-of-sight of their operators.

  14. UTM Technical Capabilities Level 2 (TLC2) Test at Reno-Stead Airport.

    NASA Image and Video Library

    2016-10-06

    Test of Unmanned Aircraft Systems Traffic Management (UTM) technical capability Level 2 (TCL2) at Reno-Stead Airport, Nevada. During the test, five drones simultaneously crossed paths, separated by altitude. Two drones flew beyond visual line-of-sight and three flew within line-of-sight of their operators. Precision Hawk pilot readies Lancaster Mark 3 UAS for test flight.

  15. Comparative Study of Nondestructive Pavement Testing, MacDill Air Force Base, Florida

    DTIC Science & Technology

    1987-07-01

    a deflection-basin fitting program that prodicts moduli of the pavement layers and subgrade. A layered-elastic program AIRPOD is used in a fatigue...Layered-elastic Limiting stress in PCC; of pavement layers ( AIRPOD ) limiting strain in AC from deflection basin (ELSYM-5) (BASFIT) AFESC Elastic moduli of...need not be made. 121. Pavement evaluation computations were next accomplished using a series of computer programs referred to as ELSYM-5 and AIRPOD

  16. Ground Penetrating Radar : Pavement Layer Thickness Evaluation

    DOT National Transportation Integrated Search

    2003-12-01

    The following report demonstrates the accuracy of using Ground Penetrating Radar (GPR) to determine both the surface layer thickness for asphalt, and concrete pavements. In addition tests were conducted to identify GPR's repeatability on dry pavement...

  17. Ground penetrating radar, pavement layer thickness evaluation

    DOT National Transportation Integrated Search

    2002-12-01

    The following report demonstrates the accuracy of using Ground Penetrating Radar (GPR) to determine both the surface layer thickness for asphalt, and concrete pavements. In addition tests were conducted to identify GPR's repeatability on dry pavement...

  18. Ground Penetrating Radar : Pavement Layer Thickness Evaluation

    DOT National Transportation Integrated Search

    2002-12-01

    The following report demonstrates the accuracy of using Ground Penetrating Radar (GPR) to determine both the surface layer thickness for asphalt, and concrete pavements. In addition tests were conducted to identify GPR's repeatability on dry pavement...

  19. Mechanistic-empirical pavement design guide calibration for pavement rehabilitation.

    DOT National Transportation Integrated Search

    2013-01-01

    The Oregon Department of Transportation (ODOT) is in the process of implementing the recently introduced AASHTO : Mechanistic-Empirical Pavement Design Guide (MEPDG) for new pavement sections. The majority of pavement work : conducted by ODOT involve...

  20. Long-Term Pavement Performance Program falling weight deflectometer maintenance manual

    DOT National Transportation Integrated Search

    2006-12-01

    The Federal Highway Administrations (FHWA) Long-Term Pavement Performance (LTPP) program operates eight Dynatest Model 8000 FWDs to collect deflection data on in-service pavement test sections across North America. LTPP has collected pavement defl...

  1. Accelerated testing for studying pavement design and performance (FY 2004) : thin bonded rigid overlay on PCCP and HMA (CISL experiment no. 13).

    DOT National Transportation Integrated Search

    2009-03-01

    The thirteenth full-scale Accelerated Pavement Test (APT) experiment at the Civil Infrastructure Laboratory (CISL) : of Kansas State University aimed to determine the response and the failure mode of thin concrete overlays. Four : pavement structures...

  2. Pavement noise measurements in Poland

    NASA Astrophysics Data System (ADS)

    Zofka, Ewa; Zofka, Adam; Mechowski, Tomasz

    2017-09-01

    The objective of this study is to investigate the feasibility of the On-Board Sound Intensity (OBSI) system to measure tire-pavement noise in Poland. In general, sources of noise emitted by the modern vehicles are the propulsion noise, aerodynamic resistance and noise generated at the tire-pavement interface. In order to capture tire-pavement noise, the OBSI system uses a noise intensity probe installed in the close proximity of that interface. In this study, OBSI measurements were performed at different types of pavement surfaces such as stone mastic asphalt (SMA), regular asphalt concrete (HMA) as well as Portland cement concrete (PCC). The influence of several necessary OBSI measurement conditions were recognized as: testing speed, air temperature, tire pressure and tire type. The results of this study demonstrate that the OBSI system is a viable and robust tool that can be used for the quality evaluation of newly built asphalt pavements in Poland. It can be also applied to generate reliable input parameters for the noise propagation models that are used to assess the environmental impact of new and existing highway corridors.

  3. Synthesis study of nondestructive testing devices for use in overlay thickness design of flexible pavements

    NASA Astrophysics Data System (ADS)

    Smith, R. E.; Lytton, R. L.

    1984-04-01

    A ready reference for highway engineers who are interested in purchasing nondestructive testing (NDT) equipment for use in designing overlays for flexible pavements was prepared. All commercially available equipment is described. Information includes basic descriptions plus current prices quoted by the manufacturers/distributors. To determine user comments, a questionnaire was sent to nine State agencies, and one Federal agency. The responses to these questionnaires are summarized. Overlay thickness design procedures for flexible pavements are reviewed. Important components related to the use of NDT deflection measuremnts in overlay design are identified and addressed. Summary tables of equipment characteristics and overlay design procedures are presented.

  4. Pavement performance evaluation, phase II : data collection.

    DOT National Transportation Integrated Search

    2008-12-01

    Phase I and II of this study tested approximately 1500 rehabilitated pavements (asphalt and PCC) : throughout the State. These pavements ranged from 5 to 15 years old and were intended to develop a : snapshot of how various rehabilitations were perfo...

  5. Methods to Use Surface Infiltration Tests in Permeable Pavement Systems to Determine Maintenance Frequency

    EPA Science Inventory

    Currently, there is limited guidance on selecting test sites to measure surface infiltration rates in permeable pavement systems to determine maintenance frequency. The ASTM method (ASTM C1701) for measuring infiltration rate of in-place pervious concrete suggest to either (1) p...

  6. Integrated Airport Surface Operations

    NASA Technical Reports Server (NTRS)

    Koczo, S.

    1998-01-01

    The current air traffic environment in airport terminal areas experiences substantial delays when weather conditions deteriorate to Instrument Meteorological Conditions (IMC). Research activity at NASA has culminated in the development, flight test and demonstration of a prototype Low Visibility Landing and Surface Operations (LVLASO) system. A NASA led industry team and the FAA developed the system which integrated airport surface surveillance systems, aeronautical data links, DGPS navigation, automation systems, and controller and flight deck displays. The LVLASO system was demonstrated at the Hartsfield-Atlanta International Airport using a Boeing 757-200 aircraft during August, 1997. This report documents the contractors role in this testing particularly in the area of data link and DGPS navigation.

  7. Long term validation of an accelerated polishing test procedure for HMA pavements.

    DOT National Transportation Integrated Search

    2013-04-01

    The Ohio Department of Transportation (ODOT) has set strategic goals to improve driving safety by maintaining : smooth pavement surfaces with high skid resistance. ODOT has taken the initiative to monitor pavement : friction on Ohio roadways and reme...

  8. Study on Flexible Pavement Failures in Soft Soil Tropical Regions

    NASA Astrophysics Data System (ADS)

    Jayakumar, M.; Chee Soon, Lee

    2015-04-01

    Road network system experienced rapid upgrowth since ages ago and it started developing in Malaysia during the colonization of British due to its significant impacts in transportation field. Flexible pavement, the major road network in Malaysia, has been deteriorating by various types of distresses which cause descending serviceability of the pavement structure. This paper discusses the pavement condition assessment carried out in Sarawak and Sabah, Malaysia to have design solutions for flexible pavement failures. Field tests were conducted to examine the subgrade strength of existing roads in Sarawak at various failure locations, to assess the impact of subgrade strength on pavement failures. Research outcomes from field condition assessment and subgrade testing showed that the critical causes of pavement failures are inadequate design and maintenance of drainage system and shoulder cross fall, along with inadequate pavement thickness provided by may be assuming the conservative value of soil strength at optimum moisture content, whereas the exiting and expected subgrade strengths at equilibrium moisture content are far below. Our further research shows that stabilized existing recycled asphalt and base materials to use as a sub-base along with bitumen stabilized open graded base in the pavement composition may be a viable solution for pavement failures.

  9. Design of the optical structure of airfield in-pavement LED runway edge lights

    NASA Astrophysics Data System (ADS)

    Ma, Xiaodan; Yang, Jianhong; Peng, Jun; Li, Lei

    2017-02-01

    Airfield lighting system is an important aiding system of civil aviation airport that guarantees the taking off, landing, taxiing of airplanes at night, with low visibility, or under other complicated weather conditions. In-pavement LED runway edge lights, with the highest degree of light intensity, are the most important lights for safe civil aviation and are most difficult to design within airfield lighting system. With LED as the source of light and the secondary optical design as the core, in light of basic laws of Fresnel loss and total reflection and the principles of edge-ray etendue conservation and the conservation of energy to design major optical elements as lens, prism of the lamp, the in-pavement LED runway edge lights design successfully solves the designing problem of high-power, high-intensity LED airfield lights with narrow beam angle at closed environment. This success is of great significance for the improvement of LED airfield lighting system in China.

  10. Determination of mechanical properties of materials used in WAY-30 test pavements.

    DOT National Transportation Integrated Search

    2010-05-01

    The US Route 30 bypass of Wooster, Ohio, in Wayne County, WAY-30, was constructed to demonstrate two types of : extended service pavements, a long-life Portland cement concrete (PCC) pavement on the eastbound lanes and an asphalt : concrete (AC...

  11. Long-term pavement performance indicators for failed materials.

    DOT National Transportation Integrated Search

    2016-04-01

    State Transportation Agencies (STAs) use quality control/quality assurance (QC/QA) specifications to guide the testing and inspection of : road pavement construction. Although failed materials of pavement rarely occur in practice, it is critical to h...

  12. Wear resistant pavement study.

    DOT National Transportation Integrated Search

    2009-01-01

    This report documents the construction of three special pavement test sections on I-90 east of Spokane, Washington. The test sections included ultra-thin and thin whitetopping, Modified Class D open graded asphalt concrete, and micro/macro surfacing ...

  13. Performance of pervious pavement parking bays storing rainwater in the north of Spain.

    PubMed

    Gomez-Ullate, E; Bayon, J R; Coupe, S; Castro-Fresno, D

    2010-01-01

    Pervious pavements are drainage techniques that improve urban water management in a sustainable manner. An experimental pervious pavement parking area has been constructed in the north of Spain (Santander), with the aim of harvesting good quality rainwater. Forty-five pervious pavement structures have been designed and constructed to measure stored water quantity and quality simultaneously. Ten of these structures are specifically constructed with different geotextile layers for improving water storage within the pavements. Following the confirmation in previous laboratory experiments that the geotextile influenced on water storage, two different geosynthetics (Inbitex and a One Way evaporation control membrane) and control pervious pavements with no geotextile layers were tested in the field. Weather conditions were monitored in order to find correlations with the water storage within the pervious pavement models tested. During one year of monitoring the three different pervious pavement types tested remained at their maximum storage capacity. The heavy rain events which occurred during the experimental period caused evaporation rates within the pervious pavements to be not significant, but allowed the researchers to observe certain trends in the water storage. Temperature was the most closely correlated weather factor with the level of the water stored within the pervious pavements tested.

  14. Pavement markings and safety.

    DOT National Transportation Integrated Search

    2010-11-01

    Previous research on pavement markings from a safety perspective tackled various issues such as pavement marking retroreflectivity : variability, relationship between pavement marking retroreflectivity and driver visibility, or pavement marking impro...

  15. Performance of high RAP pavement sections in NH.

    DOT National Transportation Integrated Search

    2015-06-01

    This report summarizes the University of New Hampshire (UNH) results of test pavements used to : determine the effect of using higher amounts of Recycled Asphalt Pavement (RAP) in Hot Mix Asphalt : (HMA). : The New Hampshire Department of Transportat...

  16. The effect of contaminant on skid resistance of pavement surface

    NASA Astrophysics Data System (ADS)

    Lubis, A. S.; Muis, Z. A.; Gultom, E. M.

    2018-03-01

    Skid resistance of the pavement surface is the force generated by the movement of the wheels of the vehicle on the surface of the pavement. Contaminants are materials that cover the surface of the pavement affecting the skid resistance of the pavement surface. The contaminant acts as a coating interface or direct contact of the pavement surface with the wheels of the vehicle which can cause adverse effects, such as the decreasing value of skid resistance of the pavement surface. This study aims to analyze the effect of some types of contaminants on skid resistance of pavement surfaces. The contaminants that used in this study were water, sand, salt, and lubricating oil. The study was conducted by direct testing on two types of pavement: flexible pavement and rigid pavement. The measurements of the skid resistance were made using the British Pendulum Tester with British Pendulum Number for two conditions: before and after the pavement surface was covered with contaminants. The results showed that there was a contaminant effect on skid resistance of pavement surface. Skid resistance of pavement surfaces decreased after the contaminants were covered in water, sand, salt, and lubricant by 20.1%, 22.8%, 37.1% and 50.5% respectively.

  17. Winter tenting of highway pavements : test program and discussion of causes and mechanisms

    DOT National Transportation Integrated Search

    2000-10-28

    Tenting consists of localized frost heaving in the immediate vicinity of transverse pavement cracks. It produces a highly irregular riding : surface, leads to premature pavement-surface deterioration, occurs on highways designed for high traffic volu...

  18. The Simulation Realization of Pavement Roughness in the Time Domain

    NASA Astrophysics Data System (ADS)

    XU, H. L.; He, L.; An, D.

    2017-10-01

    As the needs for the dynamic study on the vehicle-pavement system and the simulated vibration table test, how to simulate the pavement roughness actually is important guarantee for whether calculation and test can reflect the actual situation or not. Using the power spectral density function, the simulation of pavement roughness can be realized by Fourier inverse transform. The main idea of this method was that the spectrum amplitude and random phase were obtained separately according to the power spectrum, and then the simulation of pavement roughness was obtained in the time domain through the Fourier inverse transform (IFFT). In the process, the sampling interval (Δl) was 0.1m, and the sampling points(N) was 4096, which satisfied the accuracy requirements. Using this method, the simulate results of pavement roughness (A~H grades) were obtain in the time domain.

  19. Mechanistic design concepts for conventional flexible pavements

    NASA Astrophysics Data System (ADS)

    Elliott, R. P.; Thompson, M. R.

    1985-02-01

    Mechanical design concepts for convetional flexible pavement (asphalt concrete (AC) surface plus granular base/subbase) for highways are proposed and validated. The procedure is based on ILLI-PAVE, a stress dependent finite element computer program, coupled with appropriate transfer functions. Two design criteria are considered: AC flexural fatigue cracking and subgrade rutting. Algorithms were developed relating pavement response parameters (stresses, strains, deflections) to AC thickness, AC moduli, granular layer thickness, and subgrade moduli. Extensive analyses of the AASHO Road Test flexible pavement data are presented supporting the validity of the proposed concepts.

  20. Backcalculation of layer parameters for LTPP test sections, volume I : slab on elastic solid and slab on dense-liquid foundation analysis of rigid pavements.

    DOT National Transportation Integrated Search

    2001-01-01

    This report documents the results of backcalculation of layer material properties for rigid pavements included in the Long Term Pavement Performance (LTPP) program in the United States and Canada using deflection testing data. This study backcalculat...

  1. Backcalculation of layer parameters for LTPP test sections, volume I : slab on elastic solid and slab on dense-liquid foundation analysis of rigid pavements

    DOT National Transportation Integrated Search

    2001-01-01

    This report documents the results of backcalculation of layer material properties for rigid pavements included in the Long Term Pavement Performance (LTPP) program in the United States and Canada using deflection testing data. This study backcalculat...

  2. 76 FR 12405 - Notice of Passenger Facility Charge (PFC) Approvals and Disapprovals

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-03-07

    .... Mandatory pavement markings. Airport signage. Runway guard lights. Wildlife study. PFC application.... Runway 18/36 pavement maintenance. Runway 13/31 pavement maintenance. PFC administration fees. Brief... Use: Tractor with snow blower and snow plow. Airport security and access control upgrades--design...

  3. UTM Technical Capabilities Level 2 (TLC2) Test at Reno-Stead Airport.

    NASA Image and Video Library

    2016-10-06

    Test of Unmanned Aircraft Systems Traffic Management (UTM) technical capability Level 2 (TCL2) at Reno-Stead Airport, Nevada. During the test, five drones simultaneously crossed paths, separated by altitude. Two drones flew beyond visual line-of-sight and three flew within line-of-sight of their operators. Engineers Priya Venkatesan and Joey Mercer review flight paths using the UAS traffic management research platform at flight operations mission control at NASA’s UTM TCL2 test.

  4. Prestressed pavement rehabilitation.

    DOT National Transportation Integrated Search

    2009-06-23

    In 1989, a landmark pavement project was opened to traffic in Blair County, Pennsylvania, that received national attention. The pavement was a two-mile section of prestressed concrete pavement that was constructed on the northbound lanes of what is n...

  5. Application of the dengue virus NS1 antigen rapid test for on-site detection of imported dengue cases at airports.

    PubMed

    Shu, Pei-Yun; Yang, Cheng-Fen; Kao, Jeng-Fong; Su, Chien-Ling; Chang, Shu-Fen; Lin, Chien-Chou; Yang, Wen-Chih; Shih, Hsiu; Yang, Shih-Yan; Wu, Ping-Fuai; Wu, Ho-Sheng; Huang, Jyh-Hsiung

    2009-04-01

    We used the dengue virus NS1 antigen (Ag) rapid test for on-site detection of imported dengue cases at airports. Among 22 positive cases of dengue identified from 850 patients with a fever suspected to have dengue, 17 were NS1 Ag test positive. These findings demonstrate the usefulness of the NS1 Ag rapid test in screening imported dengue cases at airports.

  6. Airport Catchment Area- Example Warsaw Modlin Airport

    NASA Astrophysics Data System (ADS)

    Błachut, Jakub

    2017-10-01

    The form and functions of airports change over time, just like the form and function of cities. Historically, airports are understood as places of aircraft landing, control towers operation and location of other facilities used for communication and transport. This traditional model is giving way to the concept of so-called Airport Cities, based on the assumption that, in addition to its infrastructure and air services, also non-air services are performed, constituting a source of income. At the same time, their reach and impact on the economy of the areas around the airport are expanding. Idea City Airport appeared in the United States in the late twentieth century. The author is J. D. Kasarda, he believes that it is around these big air ports that airport cities develop. In the world, there are currently 45 areas which can be classified in this category, out of which 12 are located in Europe. Main air traffic hubs in Europe are not only the most important passenger traffic junctions, but also largest centres dispatching goods (cargo). It can be said that, among the 30 largest airports, 24 are the largest in terms of both passenger and freight traffic. These airports cover up to 89.9% of the total freight transport of all European airports. At the same time, they serve 56.9% of all passengers in Europe. Based on the concept of Airport City was developed document THE INTEGRATED REGIONAL POLYCENTRIC DEVELOPMENT PLANS FOR THE WARSAW MODLIN AIRPORT CATCHMENT AREA. The plan developed takes into account the findings of the Mazovian voivodeship spatial development plan, specifying the details of its provisions where possible. The development is the first step for the implementation of the concept of the Modlin Airport City. The accomplishment of this ambitious vision will only be possible with hard work of a number of entities, as well as taking into account the former Modlin Fortress, currently under revitalisation, in concepts and plans.

  7. 14 CFR 221.52 - Airport to airport application, accessorial services.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 14 Aeronautics and Space 4 2011-01-01 2011-01-01 false Airport to airport application, accessorial... Charges § 221.52 Airport to airport application, accessorial services. Tariffs shall specify whether or not the fares therein include services in addition to airport-to-airport transportation. ...

  8. 14 CFR 221.52 - Airport to airport application, accessorial services.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 14 Aeronautics and Space 4 2013-01-01 2013-01-01 false Airport to airport application, accessorial... Charges § 221.52 Airport to airport application, accessorial services. Tariffs shall specify whether or not the fares therein include services in addition to airport-to-airport transportation. ...

  9. 14 CFR 221.52 - Airport to airport application, accessorial services.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 14 Aeronautics and Space 4 2014-01-01 2014-01-01 false Airport to airport application, accessorial... Charges § 221.52 Airport to airport application, accessorial services. Tariffs shall specify whether or not the fares therein include services in addition to airport-to-airport transportation. ...

  10. 14 CFR 221.52 - Airport to airport application, accessorial services.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 14 Aeronautics and Space 4 2012-01-01 2012-01-01 false Airport to airport application, accessorial... Charges § 221.52 Airport to airport application, accessorial services. Tariffs shall specify whether or not the fares therein include services in addition to airport-to-airport transportation. ...

  11. 14 CFR 221.52 - Airport to airport application, accessorial services.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 14 Aeronautics and Space 4 2010-01-01 2010-01-01 false Airport to airport application, accessorial... Charges § 221.52 Airport to airport application, accessorial services. Tariffs shall specify whether or not the fares therein include services in addition to airport-to-airport transportation. ...

  12. 14 CFR Appendix B to Part 152 - List of Advisory Circulars Incorporated by § 152.11

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... Transport. 150/5300-8—Planning and Design Criteria for Metropolitan STOL Ports. 150/5320-6B—Airport Pavement.../5320-12—Methods for the Design, Construction, and Maintenance of Skid Resistant Airport Pavement... Communications. 150/5210-10—Airport Fire and Rescue Equipment Building Guide. 150/5300-2C—Airport Design...

  13. 14 CFR Appendix B to Part 152 - List of Advisory Circulars Incorporated by § 152.11

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... Transport. 150/5300-8—Planning and Design Criteria for Metropolitan STOL Ports. 150/5320-6B—Airport Pavement.../5320-12—Methods for the Design, Construction, and Maintenance of Skid Resistant Airport Pavement... Communications. 150/5210-10—Airport Fire and Rescue Equipment Building Guide. 150/5300-2C—Airport Design...

  14. 14 CFR Appendix B to Part 152 - List of Advisory Circulars Incorporated by § 152.11

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... Transport. 150/5300-8—Planning and Design Criteria for Metropolitan STOL Ports. 150/5320-6B—Airport Pavement.../5320-12—Methods for the Design, Construction, and Maintenance of Skid Resistant Airport Pavement... Communications. 150/5210-10—Airport Fire and Rescue Equipment Building Guide. 150/5300-2C—Airport Design...

  15. 14 CFR Appendix B to Part 152 - List of Advisory Circulars Incorporated by § 152.11

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... Transport. 150/5300-8—Planning and Design Criteria for Metropolitan STOL Ports. 150/5320-6B—Airport Pavement.../5320-12—Methods for the Design, Construction, and Maintenance of Skid Resistant Airport Pavement... Communications. 150/5210-10—Airport Fire and Rescue Equipment Building Guide. 150/5300-2C—Airport Design...

  16. 14 CFR Appendix B to Part 152 - List of Advisory Circulars Incorporated by § 152.11

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... Transport. 150/5300-8—Planning and Design Criteria for Metropolitan STOL Ports. 150/5320-6B—Airport Pavement.../5320-12—Methods for the Design, Construction, and Maintenance of Skid Resistant Airport Pavement... Communications. 150/5210-10—Airport Fire and Rescue Equipment Building Guide. 150/5300-2C—Airport Design...

  17. UTM Technical Capabilities Level 2 (TLC2) Test at Reno-Stead Airport.

    NASA Image and Video Library

    2016-10-06

    Test of Unmanned Aircraft Systems Traffic Management (UTM) technical capability Level 2 (TCL2) at Reno-Stead Airport, Nevada. During the test, five drones simultaneously crossed paths, separated by altitude. Two drones flew beyond visual line-of-sight and three flew within line-of-sight of their operators. Engineer Joey Mercer reviews flight paths using the UAS traffic management research platform UTM coordinator app to verify and validate flight paths.

  18. Pavement settlement issues and hydro-geochemical water testing results for the Cumberland Gap Tunnel : final report.

    DOT National Transportation Integrated Search

    2010-03-01

    Both Ground Penetrating Radar (GPR) surveys and Hydro-Geochemical Water Testing (HGWT) have been performed at the Cumberland Gap Tunnel to determine why the reinforced concrete pavement has settled in various areas throughout both tunnels. To date, a...

  19. Performance of a thirty-two year old concrete pavement

    DOT National Transportation Integrated Search

    1996-01-01

    This report reviews pavement performance testing results on an experimental concrete pavement built on Minnesota T.H. 36 in 1958 that contains variations in joint spacing, reinforcement, dowels, and transverse joint fillers. South Dakota Profile Serv...

  20. Objectification of Public Bus Stop's Pavement Surface Morphology

    NASA Astrophysics Data System (ADS)

    Decký, Martin; Kováč, Matúš; Mužík, Juraj; Mičechová, Lenka; Ďuriš, Lukáš

    2018-06-01

    The article deals with the road pavement surface morphology objectification in term of the surface unevenness degradation during the life cycle of bus stop pavements. The article presents the results of long-term rut depth measurements performed during 25 years on selected bus stops which were intended to determine correlation dependences of pavement rut depth on a number of design axles. The article also presents different methods for rut depth measurements including the straightedge test, Profilograph GE, TRIMBLE CX, and dynamic Road Scanner.

  1. UTM Technical Capabilities Level 2 (TLC2) Test at Reno-Stead Airport.

    NASA Image and Video Library

    2016-10-06

    Test of Unmanned Aircraft Systems Traffic Management (UTM) technical capability Level 2 (TCL2) at Reno-Stead Airport, Nevada. During the test, five drones simultaneously crossed paths, separated by altitude. Two drones flew beyond visual line-of-sight and three flew within line-of-sight of their operators. Precision Hawk pilot launches UAS Lancaster Mark 3, one of 11 vehicles in the UTM TCL2 demonstration that will fly beyond line of sight of the pilot in command in Nevada test.

  2. Implementation and thickness optimization of perpetual pavements in Ohio.

    DOT National Transportation Integrated Search

    2015-06-01

    This report documents the performance of perpetual pavement structures constructed by the Ohio Department of Transportation. : Three perpetual pavement test sections on U.S. Route 23 in Delaware, Ohio (DEL-23) were constructed with AC thicknesses 11 ...

  3. Analysis relating to pavement material characterizations and their effects on pavement performance.

    DOT National Transportation Integrated Search

    1998-01-01

    This report presents the analysis conducted on relating pavement performance or response measures and design considerations to specific pavement layers utilizing data contained in the Long-Term Pavement Performance Program National Information Manage...

  4. Airport noise

    NASA Technical Reports Server (NTRS)

    Pendley, R. E.

    1982-01-01

    The problem of airport noise at several airports and air bases is detailed. Community reactions to the noise, steps taken to reduce jet engine noise, and the effect of airport use restrictions and curfews on air transportation are discussed. The adverse effect of changes in allowable operational noise on airport safety and altenative means for reducing noise pollution are considered. Community-airport relations and public relations are discussed.

  5. Insects, vegetation, and the control of laughing gulls (Larus atricilla) at Kennedy International Airport, New York

    USGS Publications Warehouse

    Buckley, P.A.; McCarthy, M.

    1994-01-01

    1. In response to a purported 'bird-strike problem' at J.F. Kennedy International Airport in New York City, we examined short (5 cm) and long (45 cm) grass heights as gull deterrents, in a randomized-block experiment. 2. Vegetative cover, numbers of adult insects and of larval beetles (suspected on-airport food of the gulls) were sampled in the six-block, 36-plot study area, as well as gut contents of adult and downy young gulls in the immediately adjacent colony in the Jamaica Bay Wildlife Refuge. 3. We found that (i) Oriental beetle larvae were the most numerous and concentrated in one experimental block; (ii) beetle larvae numbers were uncorrelated with grass height; (iii) adult beetles were also uncorrelated with grass height; (iv) laughing gulls were distributed across blocks irrespective of percentage cover; (v) within blocks, laughing gulls were selecting short grass and avoiding long grass plots; (vi) laughing gull numbers were positively associated with numbers of Oriental beetle larvae; (vii) adult laughing gulls on the airport were eating lower-nutrition food of terrestrial origin (74-83% adult beetles, mostly Oriental plus green June and ground beetles); (viii) on the other hand, gull chicks in the adjacent breeding colony were being fed more easily digested, higher-protein food of marine origin (86-88% fishes, crustacea and molluscs); (ix) laughing gulls on the airport were taking their adult beetles only in short-grass plots, ignoring large numbers in adjacent long grass; (x) during the summer, on-airport gulls shifted from performing largely maintenance activities on pavement to feeding actively for beetles on newly mown short grass, the change coinciding with adult beetle emergence; (xi) standing water on the airport attracted significantly more gulls than dry areas all summer long. 4. We recommend a series of ecologically compatible, but aggressive habitat management actions for controlling laughing gulls on Kennedy Airport by rendering the airport

  6. UTM Technical Capabilities Level 2 (TLC2) Test at Reno-Stead Airport.

    NASA Image and Video Library

    2016-10-06

    Test of Unmanned Aircraft Systems Traffic Management (UTM) technical capability Level 2 (TCL2) at Reno-Stead Airport, Nevada. During the test, five drones simultaneously crossed paths, separated by altitude. Two drones flew beyond visual line-of-sight and three flew within line-of-sight of their operators. Drone Co-habitation Services operates a Phantom 3 commercial multi-rotor unmanned aircraft, one of 11 vehicles in the UTM TCL2 demonstration that will fly beyond line of sight of the pilot in command in Nevada test.

  7. Airport Capital Improvement Planning: Stewardship for Airport Development

    DOT National Transportation Integrated Search

    1997-09-01

    "Airport Capital Improvement Planning: Stewardship for Airport Development", was : originally written in October, 1995. It documented an effort to implement the : concept of capital improvement planning with the airport development industry. : Airpor...

  8. Smart Pavement Monitoring System

    DOT National Transportation Integrated Search

    2013-05-01

    This report describes the efforts undertaken to develop a novel self-powered strain sensor for continuous structural health monitoring of pavement systems under the Federal Highway Administration. Efforts focused on designing and testing a sensing sy...

  9. Calibration of pavement response models for the mechanistic-empirical pavement design method

    DOT National Transportation Integrated Search

    2007-09-01

    Most pavement design methodologies assume that the tire-pavement contact stress is equal to the tire inflation pressure and uniformly distributed over a circular contact area. However, tire-pavement contact area is not in a circular shape and the con...

  10. Inverted base pavements : new field test and design catalogue.

    DOT National Transportation Integrated Search

    2014-01-01

    The current economic situation has severely affected the US road infrastructure and funding has become : inadequate for either maintenance or future growth. : The inverted base pavement structure is a promising alternative to achieve high quality roa...

  11. Pavement condition model based on automated pavement distress surveys.

    DOT National Transportation Integrated Search

    2014-05-01

    Many government agencies and private consulting companies must deal with the issue of : pavement maintenance. The ability to maintain an in-service pavement structure in : acceptable condition from structural and functional points of view is related ...

  12. UTM Technical Capabilities Level 2 (TLC2) Test at Reno-Stead Airport.

    NASA Image and Video Library

    2016-10-06

    Test of Unmanned Aircraft Systems Traffic Management (UTM) technical capability Level 2 (TCL2) at Reno-Stead Airport, Nevada. During the test, five drones simultaneously crossed paths, separated by altitude. Two drones flew beyond visual line-of-sight and three flew within line-of-sight of their operators. Karen Bollinger pilot and Nick Atkins of Alaska Center for Unmanned Aircraft Systems Integration program fly Ptarmigan quadcopter, one of 11 vehicles in the UTM TCL2 demonstration that will fly beyond line of sight of the pilot in command in Nevada test.

  13. Fatigue cracking in road pavement

    NASA Astrophysics Data System (ADS)

    Mackiewicz, P.

    2018-05-01

    The article presents the problem of modelling fatigue phenomena occurring in the road pavement. The example of two selected pavements shows the changes occurring under the influence of the load in different places of the pavement layers. Attention is paid to various values of longitudinal and transverse strains generated at the moment of passing the wheel on the pavement. It was found that the key element in the crack propagation analysis is the method of transferring the load to the pavement by the tire and the strain distribution in the pavement. During the passage of the wheel in the lower layers of the pavement, a complex stress state arises. Then vertical, horizontal and tangent stresses with various values appear. The numerical analyses carried out with the use of finite element methods allowed to assess the strain and stress changes occurring in the process of cracking road pavement. It has been shown that low-thickness pavements are susceptible to fatigue cracks arising "bottom to top", while pavements thicker are susceptible to "top to bottom" cracks. The analysis of the type of stress allowed to determine the cracking mechanism.

  14. Thermal stability analysis under embankment with asphalt pavement and cement pavement in permafrost regions.

    PubMed

    Junwei, Zhang; Jinping, Li; Xiaojuan, Quan

    2013-01-01

    The permafrost degradation is the fundamental cause generating embankment diseases and pavement diseases in permafrost region while the permafrost degradation is related with temperature. Based on the field monitoring results of ground temperature along G214 Highway in high temperature permafrost regions, both the ground temperatures in superficial layer and the annual average temperatures under the embankment were discussed, respectively, for concrete pavements and asphalt pavements. The maximum depth of temperature field under the embankment for concrete pavements and asphalt pavements was also studied by using the finite element method. The results of numerical analysis indicate that there were remarkable seasonal differences of the ground temperatures in superficial layer between asphalt pavement and concrete pavement. The maximum influencing depth of temperature field under the permafrost embankment for every pavement was under the depth of 8 m. The thawed cores under both embankments have close relation with the maximum thawed depth, the embankment height, and the service time. The effective measurements will be proposed to keep the thermal stabilities of highway embankment by the results.

  15. Thermal Stability Analysis under Embankment with Asphalt Pavement and Cement Pavement in Permafrost Regions

    PubMed Central

    Jinping, Li; Xiaojuan, Quan

    2013-01-01

    The permafrost degradation is the fundamental cause generating embankment diseases and pavement diseases in permafrost region while the permafrost degradation is related with temperature. Based on the field monitoring results of ground temperature along G214 Highway in high temperature permafrost regions, both the ground temperatures in superficial layer and the annual average temperatures under the embankment were discussed, respectively, for concrete pavements and asphalt pavements. The maximum depth of temperature field under the embankment for concrete pavements and asphalt pavements was also studied by using the finite element method. The results of numerical analysis indicate that there were remarkable seasonal differences of the ground temperatures in superficial layer between asphalt pavement and concrete pavement. The maximum influencing depth of temperature field under the permafrost embankment for every pavement was under the depth of 8 m. The thawed cores under both embankments have close relation with the maximum thawed depth, the embankment height, and the service time. The effective measurements will be proposed to keep the thermal stabilities of highway embankment by the results. PMID:24027444

  16. Detecting of foreign object debris on airfield pavement using convolution neural network

    NASA Astrophysics Data System (ADS)

    Cao, Xiaoguang; Gu, Yufeng; Bai, Xiangzhi

    2017-11-01

    It is of great practical significance to detect foreign object debris (FOD) timely and accurately on the airfield pavement, because the FOD is a fatal threaten for runway safety in airport. In this paper, a new FOD detection framework based on Single Shot MultiBox Detector (SSD) is proposed. Two strategies include making the detection network lighter and using dilated convolution, which are proposed to better solve the FOD detection problem. The advantages mainly include: (i) the network structure becomes lighter to speed up detection task and enhance detection accuracy; (ii) dilated convolution is applied in network structure to handle smaller FOD. Thus, we get a faster and more accurate detection system.

  17. Interior car noise created by textured pavement surfaces : final report.

    DOT National Transportation Integrated Search

    1975-01-01

    Because of widespread concern about the effect of textured pavement surfaces on interior car noise, sound pressure levels (SPL) were measured inside a test vehicle as it traversed 21 pavements with various textures. A linear regression analysis run o...

  18. Overview of the Arizona Quiet Pavement Program

    NASA Astrophysics Data System (ADS)

    Donavan, Paul; Scofield, Larry

    2005-09-01

    The Arizona Quiet Pavement Pilot Program (QP3) was initially implemented to reduce highway related traffic noise by overlaying most of the Phoenix metropolitan area Portland cement concrete pavement with a one inch thick asphalt rubber friction coarse. With FHWA support, this program represents the first time that pavement surface type has been allowed as a noise mitigation strategy on federally funded projects. As a condition of using pavement type as a noise mitigation strategy, ADOT developed a ten-year, $3.8 million research program to evaluate the noise reduction performance over time. Historically, pavement surface type was not considered a permanent solution. As a result, the research program was designed to specifically address this issue. Noise performance is being evaluated through three means: (1) conventional roadside testing within the roadway corridor (e.g., far field measurements within the right-of-way) (2) the use of near field measurements, both close proximity (CPX) and sound intensity (SI); and (3) far field measurements obtained beyond the noise barriers within the surrounding neighborhoods. This paper provides an overview of the program development, presents the research conducted to support the decision to overlay the urban freeway, and the status of current research.

  19. Highway concrete pavement technology development and testing. Volume 2, field evaluation of strategic highway research program (SHRP) C-203 test sites (freeze-thaw resistance)

    DOT National Transportation Integrated Search

    2006-08-01

    Field test sections were constructed during 1992 as part of the Strategic Highway Research Program (SHRP) investigation of the frost resistance of concrete. The first freeze-thaw-related deterioration expected for pavement concrete exposed to de-icin...

  20. Flight Testing of an Airport Surface Guidance, Navigation, and Control System

    NASA Technical Reports Server (NTRS)

    Young, Steven D.; Jones, Denise R.

    1998-01-01

    This document describes operations associated with a set of flight experiments and demonstrations using a Boeing-757-200 (B-757) research aircraft as part of low visibility landing and surface operations (LVLASO) research activities. To support this experiment, the B-757 performed flight and taxi operations at the Hartsfield-Atlanta International Airport (ATL) in Atlanta, GA. The B-757 was equipped with experimental displays that were designed to provide flight crews with sufficient information to enable safe, expedient surface operations in any weather condition down to a runway visual range (RVR) of 300 feet. In addition to flight deck displays and supporting equipment onboard the B-757, there was also a ground-based component of the system that provided for ground controller inputs and surveillance of airport surface movements. The integrated ground and airborne components resulted in a system that has the potential to significantly improve the safety and efficiency of airport surface movements particularly as weather conditions deteriorate. Several advanced technologies were employed to show the validity of the operational concept at a major airport facility, to validate flight simulation findings, and to assess each of the individual technologies performance in an airport environment. Results show that while the maturity of some of the technologies does not permit immediate implementation, the operational concept is valid and the performance is more than adequate in many areas.

  1. The Tire Noise Performance of Nevada Highway Pavements: On-Board Sound Intensity (OBSI) Measurement

    DOT National Transportation Integrated Search

    2008-06-01

    On Board Sound Intensity measurements were conducted on freeway segments in the vicinity of Las Vegas and Reno, Nevada in an effort to document the tire-pavement noise levels of existing pavements. Tested pavements included Portland Cement Concrete (...

  2. Flight Test Evaluation of Synthetic Vision Concepts at a Terrain Challenged Airport

    NASA Technical Reports Server (NTRS)

    Kramer, Lynda J.; Prince, Lawrence J., III; Bailey, Randell E.; Arthur, Jarvis J., III; Parrish, Russell V.

    2004-01-01

    NASA's Synthetic Vision Systems (SVS) Project is striving to eliminate poor visibility as a causal factor in aircraft accidents as well as enhance operational capabilities of all aircraft through the display of computer generated imagery derived from an onboard database of terrain, obstacle, and airport information. To achieve these objectives, NASA 757 flight test research was conducted at the Eagle-Vail, Colorado airport to evaluate three SVS display types (Head-up Display, Head-Down Size A, Head-Down Size X) and two terrain texture methods (photo-realistic, generic) in comparison to the simulated Baseline Boeing-757 Electronic Attitude Direction Indicator and Navigation/Terrain Awareness and Warning System displays. The results of the experiment showed significantly improved situation awareness, performance, and workload for SVS concepts compared to the Baseline displays and confirmed the retrofit capability of the Head-Up Display and Size A SVS concepts. The research also demonstrated that the tunnel guidance display concept used within the SVS concepts achieved required navigation performance (RNP) criteria.

  3. Stormwater quality of spring-summer-fall effluent from three partial-infiltration permeable pavement systems and conventional asphalt pavement.

    PubMed

    Drake, Jennifer; Bradford, Andrea; Van Seters, Tim

    2014-06-15

    This study examined the spring, summer and fall water quality performance of three partial-infiltration permeable pavement (PP) systems and a conventional asphalt pavement in Ontario. The study, conducted between 2010 and 2012, compared the water quality of effluent from two Interlocking Permeable Concrete Pavements (AquaPave(®) and Eco-Optiloc(®)) and a Hydromedia(®) Pervious Concrete pavement with runoff from an Asphalt control pavement. The usage of permeable pavements can mitigate the impact of urbanization on receiving surface water systems through quantity control and stormwater treatment. The PP systems provided excellent stormwater treatment for petroleum hydrocarbons, total suspended solids, metals (copper, iron, manganese and zinc) and nutrients (total-nitrogen and total-phosphorus) by reducing event mean concentrations (EMC) as well as total pollutant loadings. The PPs significantly reduced the concentration and loading of ammonia (NH4(+)+NH3), nitrite (NO2(-)) and organic-nitrogen (Org-N) but increased the concentration and loading of nitrate (NO3(-)). The PP systems had mixed performances for the treatment of phosphate (PO4(3-)). The PP systems increased the concentration of sodium (Na) and chloride (Cl) but EMCs remained well below recommended levels for drinking water quality. Relative to the observed runoff, winter road salt was released more slowly from the PP systems resulting in elevated spring and early-summer Cl and Na concentrations in effluent. PP materials were found to introduce dissolved solids into the infiltrating stormwater. The release of these pollutants was verified by additional laboratory scale testing of the individual pavement and aggregate materials at the University of Guelph. Pollutant concentrations were greatest during the first few months after construction and declined rapidly over the course of the study. Copyright © 2014 Elsevier Ltd. All rights reserved.

  4. Prediction of Weather Impacted Airport Capacity using Ensemble Learning

    NASA Technical Reports Server (NTRS)

    Wang, Yao Xun

    2011-01-01

    Ensemble learning with the Bagging Decision Tree (BDT) model was used to assess the impact of weather on airport capacities at selected high-demand airports in the United States. The ensemble bagging decision tree models were developed and validated using the Federal Aviation Administration (FAA) Aviation System Performance Metrics (ASPM) data and weather forecast at these airports. The study examines the performance of BDT, along with traditional single Support Vector Machines (SVM), for airport runway configuration selection and airport arrival rates (AAR) prediction during weather impacts. Testing of these models was accomplished using observed weather, weather forecast, and airport operation information at the chosen airports. The experimental results show that ensemble methods are more accurate than a single SVM classifier. The airport capacity ensemble method presented here can be used as a decision support model that supports air traffic flow management to meet the weather impacted airport capacity in order to reduce costs and increase safety.

  5. Texas flexible pavements and overlays : data analysis plans and reporting format.

    DOT National Transportation Integrated Search

    2012-01-01

    This five-year project was initiated to collect materials and pavement performance data on a minimum of 100 : highway test sections around the State of Texas, incorporating flexible pavements and overlays. Besides being used to : calibrate and valida...

  6. MDOT innovation leading to faster, longer-lasting pavement repairs : research spotlight.

    DOT National Transportation Integrated Search

    2015-01-01

    Current methods of patching pavement must evolve to meet increasing mobility demands. : To address this need, MDOT has been testing a new generation of rapid set full-depth : pavement repair materials. Initial results are promising. The new materials...

  7. Experimental Investigation of Bio-Sealants Used for Pavement Preservation and Development of a New Strength Test for Asphalt Binders at Low Temperature

    NASA Astrophysics Data System (ADS)

    Ghosh, Debaroti

    Surface treatment using sealants as a mean of pavement preservation is an important tool for cost-effectively extending service life of pavement. Sealants have become an important tool for cost-effectively extending the service life pavements. Due to the combined negative effects of asphalt aging and thermal cracking, it is always more challenging to choose an appropriate preservation technique for pavements built in cold-regions. Asphalt aging and thermal cracking negatively affect pavements built in cold climates. Therefore, it is important to evaluate the effects of sealants in laboratory conditions before application in the field to ensure effective performance. However, preservation activities cannot effectively address major distresses, such as low-temperature cracking, that can occur when the pavement was built from the very beginning with less durable materials. Therefore, an essential requirement to mitigate low-temperature cracking of pavements for asphalt materials used in the construction of pavement built in cold- regions is ensuring proper fracture properties of the asphalt materials used in construction. This study has two parts. In the first part, a laboratory evaluation of the effects of adding bio-sealants to both asphalt binder and mixture is performed. The goal is to obtain relevant properties of treated asphalt materials to understand the mechanism by which sealants improve pavement performance. For asphalt binders, a dynamic shear rheometer and a bending beam rheometer were used to obtain rheological properties of treated and untreated asphalt binders. For asphalt mixtures, field cores from both untreated and treated sections were collected and thin beam specimens were prepared from the cores to compare the creep and strength properties of the field-treated and laboratory-treated mixture. It is observed that the oil-based sealants have a significant softening effect on the control binder compared to the water-based sealant and traditional

  8. Aggregate Toughness/Abrasion Resistance and Durability/Soundness Tests Related to Asphalt Concrete Performance in Pavements

    DOT National Transportation Integrated Search

    1998-03-01

    The properties of aggregates used in asphalt concretes are very important to the performance of the pavements in which the asphalt concretes are used. Often pavement distress, such as stripping and rutting, can be traced directly to the aggregates us...

  9. Oxygen demand of aircraft and airfield pavement deicers and alternative freezing point depressants

    USGS Publications Warehouse

    Corsi, Steven R.; Mericas, Dean; Bowman, George

    2012-01-01

    Aircraft and pavement deicing formulations and other potential freezing point depressants were tested for biochemical oxygen demand (BOD) and chemical oxygen demand (COD). Propylene glycol-based aircraft deicers exhibited greater BOD5 than ethylene glycol-based aircraft deicers, and ethylene glycol-based products had lower degradation rates than propylene glycol-based products. Sodium formate pavement deicers had lower COD than acetate-based pavement deicers. The BOD and COD results for acetate-based pavement deicers (PDMs) were consistently lower than those for aircraft deicers, but degradation rates were greater in the acetate-based PDM than in aircraft deicers. In a 40-day testing of aircraft and pavement deicers, BOD results at 20°C (standard) were consistently greater than the results from 5°C (low) tests. The degree of difference between standard and low temperature BOD results varied among tested products. Freshwater BOD test results were not substantially different from marine water tests at 20°C, but glycols degraded slower in marine water than in fresh water for low temperature tests. Acetate-based products had greater percentage degradation than glycols at both temperatures. An additive component of the sodium formate pavement deicer exhibited toxicity to the microorganisms, so BOD testing did not work properly for this formulation. BOD testing of alternative freezing point depressants worked well for some, there was little response for some, and for others there was a lag in response while microorganisms acclimated to the freezing point depressant as a food source. Where the traditional BOD5 test performed adequately, values ranged from 251 to 1,580 g/kg. Where the modified test performed adequately, values of BOD28 ranged from 242 to 1,540 g/kg.

  10. Resilient Modulus of Freeze-Thaw Affected Granular Soils for Pavement Design and Evaluation. Part 2. Field Validation Tests at Winchendon, Massachusetts, Test Sections,

    DTIC Science & Technology

    1986-10-01

    AD-AI?5 394 RESILIENT MODULUS OF FREEZE-THAN AFFECTED GRANULAR 1/1 SOILS FOR PAVEMENT DES . .( U) COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH...Chamberlain, who had a major role in the de - velopment of the laboratory testing techniques; Glenn Durell, who conducted the resilient modulus testing; and...notorious. In areas of seasonal moisture tension, and the stresses imposed in the frost the supporting capacity of subgrade soils and triaxial tests. For

  11. Nondestructive evaluation of pavement structural condition for rehabilitation design : final report.

    DOT National Transportation Integrated Search

    2016-05-31

    Falling Weight Deflectometer (FWD) is the common non-destructive testing method for in-situ evaluation of pavement condition. : This study aims to develop finite element (FE) models that can simulate FWD loading on pavement system and capture the : c...

  12. Existing pavement input information for the mechanistic-empirical pavement design guide.

    DOT National Transportation Integrated Search

    2009-02-01

    The objective of this study is to systematically evaluate the Iowa Department of Transportations (DOTs) existing Pavement Management Information System (PMIS) with respect to the input information required for Mechanistic-Empirical Pavement Des...

  13. Experimental flexible pavements.

    DOT National Transportation Integrated Search

    1971-01-01

    A program of construction and the performance evaluation of three major Virginia experimental flexible pavements is reported. The objective of the program was to evaluate the performance of pavements incorporating new or timely design concepts and to...

  14. Airport technology international 1993

    NASA Astrophysics Data System (ADS)

    Papagiorcopulo, George

    The present survey of developments in airport technologies and their management discusses airport extensions and upgradings, airport developments in China, polluter penalization, airport effects on environments, European ground-handling methods, ATC in Europe, EC duty-free sales at airports, and the privatization of airport security. Also discussed are airport advertising, new alternatives in air-cargo handling, ATC training, taxi-guidance systems, and the reduction of fuel consumption and emissions on the ground. (No individual items are abstracted in this volume)

  15. Potential applicability of stress wave velocity method on pavement base materials as a non-destructive testing technique

    NASA Astrophysics Data System (ADS)

    Mahedi, Masrur

    Aggregates derived from natural sources have been used traditionally as the pavement base materials. But in recent times, the extraction of these natural aggregates has become more labor intensive and costly due to resource depletion and environmental concerns. Thus, the uses of recycled aggregates as the supplementary of natural aggregates are increasing considerably in pavement construction. Use of recycled aggregates such as recycled crushed concrete (RCA) and recycled asphalt pavement (RAP) reduces the rate of natural resource depletion, construction debris and cost. Although recycled aggregates could be used as a viable alternative of conventional base materials, strength characteristics and product variability limit their utility to a great extent. Hence, their applicability is needed to be evaluated extensively based on strength, stiffness and cost factors. But for extensive evaluation, traditionally practiced test methods are proven to be unreasonable in terms of time, cost, reliability and applicability. On the other hand, rapid non-destructive methods have the potential to be less time consuming and inexpensive along with the low variability of test results; therefore improving the reliability of estimated performance of the pavement. In this research work, the experimental program was designed to assess the potential application of stress wave velocity method as a non-destructive test in evaluating recycled base materials. Different combinations of cement treated recycled concrete aggregate (RAP) and recycled crushed concrete (RCA) were used to evaluate the applicability of stress wave velocity method. It was found that, stress wave velocity method is excellent in characterizing the strength and stiffness properties of cement treated base materials. Statistical models, based on P-wave velocity were derived for predicting the modulus of elasticity and compressive strength of different combinations of cement treated RAP, Grade-1 and Grade-2 materials. Two

  16. Flight Test Comparison of Synthetic Vision Display Concepts at Dallas/Fort Worth International Airport

    NASA Technical Reports Server (NTRS)

    Glaab, Louis J.; Kramer, Lynda J.; Arthur, Trey; Parrish, Russell V.; Barry, John S.

    2003-01-01

    Limited visibility is the single most critical factor affecting the safety and capacity of worldwide aviation operations. Synthetic Vision Systems (SVS) technology can solve this visibility problem with a visibility solution. These displays employ computer-generated terrain imagery to present 3D, perspective out-the-window scenes with sufficient information and realism to enable operations equivalent to those of a bright, clear day, regardless of weather conditions. To introduce SVS display technology into as many existing aircraft as possible, a retrofit approach was defined that employs existing HDD display capabilities for glass cockpits and HUD capabilities for the other aircraft. This retrofit approach was evaluated for typical nighttime airline operations at a major international airport. Overall, 6 evaluation pilots performed 75 research approaches, accumulating 18 hours flight time evaluating SVS display concepts that used the NASA LaRC's Boeing B-757-200 aircraft at Dallas/Fort Worth International Airport. Results from this flight test establish the SVS retrofit concept, regardless of display size, as viable for tested conditions. Future assessments need to extend evaluation of the approach to operations in an appropriate, terrain-challenged environment with daytime test conditions.

  17. Pavement scores synthesis.

    DOT National Transportation Integrated Search

    2009-02-01

    The purpose of this synthesis was to summarize the use of pavement scores by the states, including the : rating methods used, the score scales, and descriptions; if the scores are used for recommending pavement : maintenance and rehabilitation action...

  18. Extending the Service Life of Pavements

    NASA Astrophysics Data System (ADS)

    Gschwendt, Ivan

    2018-03-01

    The cost of road construction and expenditures on the maintenance of pavements, i.e., their whole life cost, represents a lot of money. The paper describes a procedure for a pavement management system with degradation models and estimates the length of time for the rehabilitation of an asphalt pavement. Using a theory of pavement mechanics, we calculated the stresses and strains on the layers of two pavement models. High modulus asphalt concrete, an asphalt mix with a high binder content, and an asphalt mix with binder modifications are new road building materials. Prolonging the time for the rehabilitation of pavements is possible.

  19. Continuously reinforced concrete pavement inventory

    NASA Astrophysics Data System (ADS)

    Halverson, A. D.; Hagen, M. G.

    1982-09-01

    A typical concrete pavement has expansion and contraction joints across and along the pavement surface. The joints allow the pavement to change in dimension with changes in temperature. A continuously reinforced concrete pavement (CRCP) does not have expansion or contraction joints. Random, closely spaced cracks are expected to develop naturally and allow for expansion and contraction due to temperature changes. The many random cracks eliminate expensive joint maintenance. This maintenance-free service life feature has not occurred in Minnesota. This CRCP inventory is a physical evaluation of the extent of corrosion on random sections of pavement. It is related to concurrent efforts which will evaluate CRCP rehabilitation techniques.

  20. A road pavement full-scale test track containing stabilized bottom ashes.

    PubMed

    Toraldo, E; Saponaro, S

    2015-01-01

    This paper reports the results of a road pavement full-scale test track built by using stabilized bottom ash (SBA) from an Italian municipal solid waste incinerator as the aggregate in granular foundation, cement-bound mixes and asphalt concretes. The investigation focused on both the performance and the environmental compatibility of such mixes, especially with regard to the effects of mixing, laying and compaction. From the road construction point of view, the performance related to the effects of mixing, laying and compaction on constructability was assessed, as well as the volumetric and the mechanical properties. Environmental aspects were investigated by leaching tests. The results suggested that SBA meets the environmental Italian law for the reuse of non-hazardous waste and could be used as road material with the procedures, plants and equipment currently used for road construction.

  1. Tack coat optimization for HMA overlays : accelerated pavement test report.

    DOT National Transportation Integrated Search

    2009-02-01

    Interface bonding between hot-mix asphalt (HMA) overlays and Portland cement concrete (PCC) pavements is one : of the most significant factors affecting overlay service life. This study was performed to quantify the effects of HMA type, : tack coat t...

  2. Enhancing GDOT's Computerized Pavement Condition Evaluation System for Pavement Condition Survey

    DOT National Transportation Integrated Search

    2017-09-01

    The Computerized Pavement Condition Evaluation System (COPACES) is a software tool that has been used by the Georgia Department of Transportation (GDOT) for its statewide pavement condition survey since the late 1990s. The previous version was releas...

  3. Usage of digital image correlation in assessment of behavior of block element pavement structure

    NASA Astrophysics Data System (ADS)

    Grygierek, M.; Grzesik, B.; Rokitowski, P.; Rusin, T.

    2018-05-01

    In diagnostics of existing road pavement structures deflection measurements have fundamental meaning, because of ability to assess present stiffness (bearing capacity) of whole layered construction. During test loading the reaction of pavement structure to applied load is measured in central point or in a few points located along a straight on a 1.5 ÷ 1.8 m distance (i.e. Falling Weight Deflectometer) in similar spacing equal to 20 ÷ 30 cm. Typical measuring techniques are productive and precise enough for most common pavement structures such as flexible, semi-rigid and rigid. It should be noted that in experimental research as well as in pavements in complex stress state, measurement techniques allowing observation of pavement deformation in 3D would have been very helpful. A great example of that type of pavements is a block element pavement structure consisting of i.e. paving blocks or stone slabs. Due to high stiffness and confined ability of cooperation of surrounding block elements, in that type of pavements fatigue life is strongly connected with displacement distribution. Unfortunately, typical deflection measurement methods forefend displacement observations and rotation of single block elements like paving blocks or slabs. Another difficult problem is to carry out unmistakable analysis of cooperation between neighboring elements. For more precise observations of displacements state of block element pavements under a wheel load a Digital Image Correlation (DIC) was used. Application of this method for assessment of behavior of stone slabs pavement under a traffic load enabled the monitoring of deformations distribution and encouraged to formulate conclusions about the initiation mechanism and development of damages in this type of pavement structures. Results shown in this article were obtained in field tests executed on an exploited pavement structure with a surface course made of granite slabs with dimensions 0.5x1.0x0.14 m.

  4. Impacts of pavement types on in-vehicle noise and human health.

    PubMed

    Li, Qing; Qiao, Fengxiang; Yu, Lei

    2016-01-01

    Noise is a major source of pollution that can affect the human physiology and living environment. According to the World Health Organization (WHO), an exposure for longer than 24 hours to noise levels above 70 dB(A) may damage human hearing sensitivity, induce adverse health effects, and cause anxiety to residents nearby roadways. Pavement type with different roughness is one of the associated sources that may contribute to in-vehicle noise. Most previous studies have focused on the impact of pavement type on the surrounding acoustic environment of roadways, and given little attention to in-vehicle noise levels. This paper explores the impacts of different pavement types on in-vehicle noise levels and the associated adverse health effects. An old concrete pavement and a pavement with a thin asphalt overlay were chosen as the test beds. The in-vehicle noise caused by the asphalt and concrete pavements were measured, as well as the drivers' corresponding heart rates and reported riding comfort. Results show that the overall in-vehicle sound levels are higher than 70 dB(A) even at midnight. The newly overlaid asphalt pavement reduced in-vehicle noise at a driving speed of 96.5 km/hr by approximately 6 dB(A). Further, on the concrete pavement with higher roughness, driver heart rates were significantly higher than on the asphalt pavement. Drivers reported feeling more comfortable when driving on asphalt than on concrete pavement. Further tests on more drivers with different demographic characteristics, along highways with complicated configurations, and an examination of more factors contributing to in-vehicle noise are recommended, in addition to measuring additional physical symptoms of both drivers and passengers. While there have been many previous noise-related studies, few have addressed in-vehicle noise. Most studies have focused on the noise that residents have complained about, such as neighborhood traffic noise. As yet, there have been no complaints by

  5. Evaluation of high pressure water blast with rotating spray bar for removing paint and rubber deposits from airport runways, and review of runway slipperiness problems created by rubber contamination

    NASA Technical Reports Server (NTRS)

    Horne, W. B.; Griswold, G. D.

    1975-01-01

    A high pressure water blast with rotating spray bar treatment for removing paint and rubber deposits from airport runways is studied. The results of the evaluation suggest that the treatment is very effective in removing above surface paint and rubber deposits to the point that pavement skid resistance is restored to trafficked but uncontaminated runway surface skid resistance levels. Aircraft operating problems created by runway slipperiness are reviewed along with an assessment of the contributions that pavement surface treatments, surface weathering, traffic polishing, and rubber deposits make in creating or alleviating runway slipperiness. The results suggest that conventional surface treatments for both portland cement and asphaltic concrete runways are extremely vulnerable to rubber deposit accretions which can produce runway slipperiness conditions for aircraft operations as or more slippery than many snow and ice-covered runway conditions. Pavement grooving surface treatments are shown to be the least vulnerable to rubber deposits accretion and traffic polishing of the surface treatments examined.

  6. Mechanistic flexible pavement overlay design program.

    DOT National Transportation Integrated Search

    2009-07-01

    The current Louisiana Department of Transportation and Development (LADOTD) overlay thickness design method follows the Component : Analysis procedure provided in the 1993 AASHTO pavement design guide. Since neither field nor laboratory tests a...

  7. Noise measurements of highway pavements in Texas.

    DOT National Transportation Integrated Search

    2009-10-01

    This report presents the results of noise testing performed on Texas pavements between May of 2006 and the : summer of 2008. Two field test methodologies were used: roadside noise measurement with SPL meters and onvehicle : sound intensity measuremen...

  8. Back-calculation of layer parameters for LTPP test sections, volume II : layered elastic analysis for flexible and rigid pavements.

    DOT National Transportation Integrated Search

    2000-09-01

    The Long Term Pavement Performance (LTPP) program has been collecting profile and : International Roughness Index (IRI) information from more than 2,062 test sections since 1989 : using K.J. Law 690DNC optical sensor Profilometers. Analysis of the IR...

  9. 14 CFR 121.445 - Pilot in command airport qualification: Special areas and airports.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 14 Aeronautics and Space 3 2013-01-01 2013-01-01 false Pilot in command airport qualification... Qualifications § 121.445 Pilot in command airport qualification: Special areas and airports. (a) The... any person serve, as pilot in command to or from an airport determined to require special airport...

  10. 14 CFR 121.445 - Pilot in command airport qualification: Special areas and airports.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 14 Aeronautics and Space 3 2011-01-01 2011-01-01 false Pilot in command airport qualification... Qualifications § 121.445 Pilot in command airport qualification: Special areas and airports. (a) The... any person serve, as pilot in command to or from an airport determined to require special airport...

  11. 14 CFR 121.445 - Pilot in command airport qualification: Special areas and airports.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 14 Aeronautics and Space 3 2012-01-01 2012-01-01 false Pilot in command airport qualification... Qualifications § 121.445 Pilot in command airport qualification: Special areas and airports. (a) The... any person serve, as pilot in command to or from an airport determined to require special airport...

  12. 14 CFR 121.445 - Pilot in command airport qualification: Special areas and airports.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 14 Aeronautics and Space 3 2010-01-01 2010-01-01 false Pilot in command airport qualification... Qualifications § 121.445 Pilot in command airport qualification: Special areas and airports. (a) The... any person serve, as pilot in command to or from an airport determined to require special airport...

  13. 14 CFR 121.445 - Pilot in command airport qualification: Special areas and airports.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 14 Aeronautics and Space 3 2014-01-01 2014-01-01 false Pilot in command airport qualification... Qualifications § 121.445 Pilot in command airport qualification: Special areas and airports. (a) The... any person serve, as pilot in command to or from an airport determined to require special airport...

  14. Volcanic hazards to airports

    USGS Publications Warehouse

    Guffanti, M.; Mayberry, G.C.; Casadevall, T.J.; Wunderman, R.

    2009-01-01

    Volcanic activity has caused significant hazards to numerous airports worldwide, with local to far-ranging effects on travelers and commerce. Analysis of a new compilation of incidents of airports impacted by volcanic activity from 1944 through 2006 reveals that, at a minimum, 101 airports in 28 countries were affected on 171 occasions by eruptions at 46 volcanoes. Since 1980, five airports per year on average have been affected by volcanic activity, which indicates that volcanic hazards to airports are not rare on a worldwide basis. The main hazard to airports is ashfall, with accumulations of only a few millimeters sufficient to force temporary closures of some airports. A substantial portion of incidents has been caused by ash in airspace in the vicinity of airports, without accumulation of ash on the ground. On a few occasions, airports have been impacted by hazards other than ash (pyroclastic flow, lava flow, gas emission, and phreatic explosion). Several airports have been affected repeatedly by volcanic hazards. Four airports have been affected the most often and likely will continue to be among the most vulnerable owing to continued nearby volcanic activity: Fontanarossa International Airport in Catania, Italy; Ted Stevens Anchorage International Airport in Alaska, USA; Mariscal Sucre International Airport in Quito, Ecuador; and Tokua Airport in Kokopo, Papua New Guinea. The USA has the most airports affected by volcanic activity (17) on the most occasions (33) and hosts the second highest number of volcanoes that have caused the disruptions (5, after Indonesia with 7). One-fifth of the affected airports are within 30 km of the source volcanoes, approximately half are located within 150 km of the source volcanoes, and about three-quarters are within 300 km; nearly one-fifth are located more than 500 km away from the source volcanoes. The volcanoes that have caused the most impacts are Soufriere Hills on the island of Montserrat in the British West Indies

  15. Task 4 : testing Iowa Portland cement concrete mixtures for the AASHTO mechanistic-empirical pavement design procedure.

    DOT National Transportation Integrated Search

    2008-05-01

    The present research project was designed to identify the typical Iowa material input values that are required by the Mechanistic- : Empirical Pavement Design Guide (MEPDG) for the Level 3 concrete pavement design. It was also designed to investigate...

  16. Assessment of technical condition of concrete pavement by the example of district road

    NASA Astrophysics Data System (ADS)

    Linek, M.; Nita, P.; Żebrowski, W.; Wolka, P.

    2018-05-01

    The article presents the comprehensive assessment of concrete pavement condition. Analyses included the district road located in the swietokrzyskie province, used for 11 years. Comparative analyses were conducted twice. The first analysis was carried out after 9 years of pavement operation, in 2015. In order to assess the extent of pavement degradation, the tests were repeated in 2017. Within the scope of field research, the traffic intensity within the analysed road section was determined. Visual assessment of pavement condition was conducted, according to the guidelines included in SOSN-B. Visual assessment can be extended by ground-penetrating radar measurements which allow to provide comprehensive assessment of the occurred structure changes within its entire thickness and length. The assessment included also performance parameters, i.e. pavement regularity, surface roughness and texture. Extension of test results by the assessment of changes in internal structure of concrete composite and structure observations by means of Scanning Electron Microscope allow for the assessment of parameters of internal structure of hardened concrete. Supplementing the observations of internal structure by means of computed tomography scan provides comprehensive information of possible discontinuities and composite structure. According to the analysis of the obtained results, conclusions concerning the analysed pavement condition were reached. It was determined that the pavement is distinguished by high performance parameters, its condition is good and it does not require any repairs. Maintenance treatment was suggested in order to extend the period of proper operation of the analysed pavement.

  17. Recyclability of Concrete Pavement Incorporating High Volume of Fly Ash.

    PubMed

    Yoshitake, Isamu; Ishida, Takeo; Fukumoto, Sunao

    2015-08-21

    Recyclable concrete pavement was made from fly ash and crushed limestone sand and gravel as aggregates so that the concrete pavement could be recycled to raw materials for cement production. With the aim to use as much fly ash as possible for the sustainable development of society, while achieving adequate strength development, pavement concrete having a cement-replacement ratio of 40% by mass was experimentally investigated, focusing on the strength development at an early age. Limestone powder was added to improve the early strength; flexural strength at two days reached 3.5 MPa, the minimum strength for traffic service in Japan. The matured fly ash concrete made with a cement content of 200 kg/m3 achieved a flexural strength almost equal to that of the control concrete without fly ash. Additionally, Portland cement made from the tested fly ash concrete was tested to confirm recyclability, with the cement quality meeting the Japanese classification of ordinary Portland cement. Limestone-based recyclable fly ash concrete pavement is, thus, a preferred material in terms of sustainability.

  18. Recyclability of Concrete Pavement Incorporating High Volume of Fly Ash

    PubMed Central

    Yoshitake, Isamu; Ishida, Takeo; Fukumoto, Sunao

    2015-01-01

    Recyclable concrete pavement was made from fly ash and crushed limestone sand and gravel as aggregates so that the concrete pavement could be recycled to raw materials for cement production. With the aim to use as much fly ash as possible for the sustainable development of society, while achieving adequate strength development, pavement concrete having a cement-replacement ratio of 40% by mass was experimentally investigated, focusing on the strength development at an early age. Limestone powder was added to improve the early strength; flexural strength at two days reached 3.5 MPa, the minimum strength for traffic service in Japan. The matured fly ash concrete made with a cement content of 200 kg/m3 achieved a flexural strength almost equal to that of the control concrete without fly ash. Additionally, Portland cement made from the tested fly ash concrete was tested to confirm recyclability, with the cement quality meeting the Japanese classification of ordinary Portland cement. Limestone-based recyclable fly ash concrete pavement is, thus, a preferred material in terms of sustainability. PMID:28793518

  19. Onsite use of recycled asphalt pavement materials and geocells to reconstruct pavements damaged by heavy trucks.

    DOT National Transportation Integrated Search

    2011-07-01

    Asphalt pavements deteriorate with traffic (especially heavy trucks) and time. Maintenance and overlaying may solve minor to : medium pavement distress problems. When the condition of a pavement becomes badly deteriorated, reconstruction of the : pav...

  20. Progress on the Development of Future Airport Surface Wireless Communications Network

    NASA Technical Reports Server (NTRS)

    Kerczewski, Robert J.; Budinger, James M.; Brooks, David E.; Franklin, Morgan; DeHart, Steve; Dimond, Robert P.; Borden, Michael

    2009-01-01

    Continuing advances in airport surface management and improvements in airport surface safety are required to enable future growth in air traffic throughout the airspace, as airport arrival and departure delays create a major system bottleneck. These airport management and safety advances will be built upon improved communications, navigation, surveillance, and weather sensing, creating an information environment supporting system automation. The efficient movement of the digital data generated from these systems requires an underlying communications network infrastructure to connect data sources with the intended users with the required quality of service. Current airport surface communications consists primarily of buried copper or fiber cable. Safety related communications with mobile airport surface assets occurs over 25 kHz VHF voice and data channels. The available VHF spectrum, already congested in many areas, will be insufficient to support future data traffic requirements. Therefore, a broadband wireless airport surface communications network is considered a requirement for the future airport component of the air transportation system. Progress has been made on defining the technology and frequency spectrum for the airport surface wireless communications network. The development of a test and demonstration facility and the definition of required testing and standards development are now underway. This paper will review the progress and planned future work.

  1. Implementation and Validation of the Viscoelastic Continuum Damage Theory for Asphalt Mixture and Pavement Analysis in Brazil

    NASA Astrophysics Data System (ADS)

    Nascimento, Luis Alberto Herrmann do

    This dissertation presents the implementation and validation of the viscoelastic continuum damage (VECD) model for asphalt mixture and pavement analysis in Brazil. It proposes a simulated damage-to-fatigue cracked area transfer function for the layered viscoelastic continuum damage (LVECD) program framework and defines the model framework's fatigue cracking prediction error for asphalt pavement reliability-based design solutions in Brazil. The research is divided into three main steps: (i) implementation of the simplified viscoelastic continuum damage (S-VECD) model in Brazil (Petrobras) for asphalt mixture characterization, (ii) validation of the LVECD model approach for pavement analysis based on field performance observations, and defining a local simulated damage-to-cracked area transfer function for the Fundao Project's pavement test sections in Rio de Janeiro, RJ, and (iii) validation of the Fundao project local transfer function to be used throughout Brazil for asphalt pavement fatigue cracking predictions, based on field performance observations of the National MEPDG Project's pavement test sections, thereby validating the proposed framework's prediction capability. For the first step, the S-VECD test protocol, which uses controlled-on-specimen strain mode-of-loading, was successfully implemented at the Petrobras and used to characterize Brazilian asphalt mixtures that are composed of a wide range of asphalt binders. This research verified that the S-VECD model coupled with the GR failure criterion is accurate for fatigue life predictions of Brazilian asphalt mixtures, even when very different asphalt binders are used. Also, the applicability of the load amplitude sweep (LAS) test for the fatigue characterization of the asphalt binders was checked, and the effects of different asphalt binders on the fatigue damage properties of the asphalt mixtures was investigated. The LAS test results, modeled according to VECD theory, presented a strong correlation with

  2. Subgrade characterization for highway pavement design.

    DOT National Transportation Integrated Search

    2000-12-01

    Subgrade soil characterization expressed in terms of Resilient Modulus (MR) has become crucial for pavement design. For a new design, MR : values are generally obtained by conducting repeated triaxial tests on reconstituted/undisturbed cylindrical sp...

  3. Giving radioiodine? Think about airport security alarms.

    PubMed

    Kaniuka-Jakubowska, S; Lewczuk, A; Mizan-Gross, K; Obołończyk, L; Lass, P; Sworczak, K

    2012-01-01

    An increased sensitivity of airport detectors, a growing number of isotopic tests, and globalization of the society have raised a number of false positive radioactive alarms at airports and public places. This paper presents two new cases of patients who triggered airport security alarms after receiving 740MBq of (131)I for non-toxic goitre and attempts to compare surprisingly limited literature concerning this problem. A 57-year-old man triggered a security alarm at three different airports on the 17th, 28th, and 31st day after radioiodine exposure. Interestingly enough, in the meantime, on the 18th and 22nd day, no radiation was detected in him at the airport where he was twice detained as a source of radiation later on. The second case presents a 45-year-old woman who activated security alarm detectors while crossing a border on her coach trip 28 days after radioiodine administration. Copyright © 2011 Elsevier España, S.L. and SEMNIM. All rights reserved.

  4. Airport financing : smaller airports face future funding shortfalls

    DOT National Transportation Integrated Search

    1999-02-22

    Testimony before Subcommittee on Aviation, Committee on Transportation and : Infrastructure, House of Represenatives on airport funding issues. Testimony : focused on 1) how much funding has been made available to small airports for : capital develop...

  5. Feasibility of reclaimed asphalt pavement as aggregate in portland cement concrete pavements.

    DOT National Transportation Integrated Search

    2013-11-01

    This research effort was focused on evaluating the feasibility of using minimally processed reclaimed : asphalt pavement (RAP) as aggregate replacement in concrete pavements. This research demonstrated : that concretes with up to 50 percent of the fi...

  6. Application of high performance concrete in the pavement system : structural response of high performance concrete pavements.

    DOT National Transportation Integrated Search

    2002-03-01

    Rigid pavements make up a significant percentage of highway systems in the United States and abroad. Concrete pavements provide an economical and durable solution for highway systems, because the pavements last longer and require less maintenance. Re...

  7. MoDOT pavement preservation research program volume III, development of pavement family and treatment performance models.

    DOT National Transportation Integrated Search

    2015-10-01

    Pavement performance models describe the deterioration behavior of pavements. They are essential in a pavement management : system if the goal is to make more objective, reliable, and cost-effective decisions regarding the timing and nature of paveme...

  8. Assessing the role of pavement macrotexture in preventing crashes on highways.

    PubMed

    Pulugurtha, Srinivas S; Kusam, Prasanna R; Patel, Kuvleshay J

    2010-02-01

    The objective of this article is to assess the role of pavement macrotexture in preventing crashes on highways in the State of North Carolina. Laser profilometer data obtained from the North Carolina Department of Transportation (NCDOT) for highways comprising four corridors are processed to calculate pavement macrotexture at 100-m (approximately 330-ft) sections according to the American Society for Testing and Materials (ASTM) standards. Crash data collected over the same lengths of the corridors were integrated with the calculated pavement macrotexture for each section. Scatterplots were generated to assess the role of pavement macrotexture on crashes and logarithm of crashes. Regression analyses were conducted by considering predictor variables such as million vehicle miles of travel (as a function of traffic volume and length), the number of interchanges, the number of at-grade intersections, the number of grade-separated interchanges, and the number of bridges, culverts, and overhead signs along with pavement macrotexture to study the statistical significance of relationship between pavement macrotexture and crashes (both linear and log-linear) when compared to other predictor variables. Scatterplots and regression analysis conducted indicate a more statistically significant relationship between pavement macrotexture and logarithm of crashes than between pavement macrotexture and crashes. The coefficient for pavement macrotexture, in general, is negative, indicating that the number of crashes or logarithm of crashes decreases as it increases. The relation between pavement macrotexture and logarithm of crashes is generally stronger than between most other predictor variables and crashes or logarithm of crashes. Based on results obtained, it can be concluded that maintaining pavement macrotexture greater than or equal to 1.524 mm (0.06 in.) as a threshold limit would possibly reduce crashes and provide safe transportation to road users on highways.

  9. Analysis on mechanics response of long-life asphalt pavement at moist hot heavy loading area

    NASA Astrophysics Data System (ADS)

    Xu, Xinquan; Li, Hao; Wu, Chuanhai; Li, Shanqiang

    2018-04-01

    Based on the durability of semi-rigid base asphalt pavement test road in Guangdong Yunluo expressway, by comparing the mechanics response of modified semi-rigid base, RCC base and inverted semi-rigid base with the state of continuous, using four unit five parameter model to evaluate rut depth of asphalt pavement structure, and through commonly used fatigue life prediction model to evaluate fatigue performance of three types of asphalt pavement structure. Theoretical calculation and four years tracking observation results of test road show that rut depth of modified semi-rigid base asphalt pavement is the minimum, the road performance is the best, and the fatigue performance is the optimal.

  10. Airport Capital Improvement Plan : stewardship for airport development

    DOT National Transportation Integrated Search

    1997-09-01

    This document summarizes efforts of the Federal Aviation Administration (FAA) Office : of the Associate Administrator for Airports to implement the concept of Airport Capital : Improvement Planning (ACIP). It is based on the experiences of the FAA's ...

  11. Impact of pavement conditions on crash severity.

    PubMed

    Li, Yingfeng; Liu, Chunxiao; Ding, Liang

    2013-10-01

    Pavement condition has been known as a key factor related to ride quality, but it is less clear how exactly pavement conditions are related to traffic crashes. The researchers used Geographic Information System (GIS) to link Texas Department of Transportation (TxDOT) Crash Record Information System (CRIS) data and Pavement Management Information System (PMIS) data, which provided an opportunity to examine the impact of pavement conditions on traffic crashes in depth. The study analyzed the correlation between several key pavement condition ratings or scores and crash severity based on a large number of crashes in Texas between 2008 and 2009. The results in general suggested that poor pavement condition scores and ratings were associated with proportionally more severe crashes, but very poor pavement conditions were actually associated with less severe crashes. Very good pavement conditions might induce speeding behaviors and therefore could have caused more severe crashes, especially on non-freeway arterials and during favorable driving conditions. In addition, the results showed that the effects of pavement conditions on crash severity were more evident for passenger vehicles than for commercial vehicles. These results provide insights on how pavement conditions may have contributed to crashes, which may be valuable for safety improvement during pavement design and maintenance. Readers should notice that, although the study found statistically significant effects of pavement variables on crash severity, the effects were rather minor in reality as suggested by frequency analyses. Copyright © 2013 Elsevier Ltd. All rights reserved.

  12. California state of the pavement report, 1999

    DOT National Transportation Integrated Search

    2001-03-01

    This report presents the results of the 1999 Pavement Condition Survey for the State of California. It gives an overview of pavement conditions, vehicle miles traveled on rough pavements, needs classification, and pavement performance. For each of th...

  13. Mechanistic-empirical Pavement Design Guide Implementation

    DOT National Transportation Integrated Search

    2010-06-01

    The recently introduced Mechanistic-Empirical Pavement Design Guide (MEPDG) and associated computer software provides a state-of-practice mechanistic-empirical highway pavement design methodology. The MEPDG methodology is based on pavement responses ...

  14. Pavement marking performance analysis

    DOT National Transportation Integrated Search

    2009-06-30

    This research evaluated pavement marking performance and developed useful degradation models for thermoplastic : and paint pavement markings which can help North Carolina meet the pending FHWA minimum retroreflectivity : requirements. The impacts of ...

  15. Assessment of dynamic properties and stiffness of composite bridges with pavement defects

    NASA Astrophysics Data System (ADS)

    Kartopol'tsev, Vladimir; Kartopol'tsev, Andrei; Kolmakov, Boris

    2017-01-01

    This paper is aimed at assessing the dynamic properties and stiffness of the reinforced concrete roadway slab under live loads that impact composite bridge girders considering pavement defects. A special attention is paid to the reinforced concrete roadway slab as a transfer member of forced oscillations. The test results obtained for bridges with different spans ranging from 24 to 110 m are presented to assess the behavior of the reinforced concrete roadway slab and the dynamic stiffness of bridge span allowed for the pavement defects. Dynamic tests are carried out under controlled and random loads that simulate live load interaction with the span and the pavement with defects. The differential equations are presented for vertical oscillations of spans, pavement defect parameter, Eigen frequency and others. As a result of the experimental research the equation is derived to ascertain the dynamic stiffness of the vehicle-span system.

  16. Mechanical Response Analysis of Long-life Asphalt Pavement Structure of Yunluo High-speed on the Semi-rigid Base

    NASA Astrophysics Data System (ADS)

    Liu, Feng; Wu, Chuanhai; Xu, Xinquan; Li, Hao; Wang, Zhixiang

    2018-01-01

    In order to grasp the rule of the strain change of the semi-rigid asphalt pavement structure under the FWD load and provide a reliable theoretical and practical basis for the design of the pavement structure, based on the test section of Guangdong Yunluo expressway, taking FWD as the loading tool, by using the finite element analysis software ANSYS, the internal variation rules of each pavement structural layer were obtained. Based on the results of the theoretical analysis, the measured strain sensor was set up in the corresponding layer of the pavement structure, and the strain test plan was determined. Based on the analysis of the strain data obtained from several structural layers and field monitoring, the rationality of the type pavement structure and the strain test scheme were verified, so as to provide useful help for the design and the maintenance of the pavement structure.

  17. Geogrid Reinforced Base Course for Flexible Pavements for Light Aircraft: Literature Review and Test Section Design

    DTIC Science & Technology

    1991-05-01

    GeoarId Reinforced Agregate Layers over Weak Clay Subgrades. Milligan and Love(Z3) conducted small-scale laboratory model tests under plane strain...34. Based on the very limited literature available on geogrid applications in airfield pavements, the literature review was expanded to cover railroad...thicknesses and clay subgrade strengths. Performance of the reinforced systems was significantly better. The increased performance resulted from the

  18. Benchmark Airport Charges

    NASA Technical Reports Server (NTRS)

    deWit, A.; Cohn, N.

    1999-01-01

    The Netherlands Directorate General of Civil Aviation (DGCA) commissioned Hague Consulting Group (HCG) to complete a benchmark study of airport charges at twenty eight airports in Europe and around the world, based on 1996 charges. This study followed previous DGCA research on the topic but included more airports in much more detail. The main purpose of this new benchmark study was to provide insight into the levels and types of airport charges worldwide and into recent changes in airport charge policy and structure, This paper describes the 1996 analysis. It is intended that this work be repeated every year in order to follow developing trends and provide the most up-to-date information possible.

  19. Benchmark Airport Charges

    NASA Technical Reports Server (NTRS)

    de Wit, A.; Cohn, N.

    1999-01-01

    The Netherlands Directorate General of Civil Aviation (DGCA) commissioned Hague Consulting Group (HCG) to complete a benchmark study of airport charges at twenty eight airports in Europe and around the world, based on 1996 charges. This study followed previous DGCA research on the topic but included more airports in much more detail. The main purpose of this new benchmark study was to provide insight into the levels and types of airport charges worldwide and into recent changes in airport charge policy and structure. This paper describes the 1996 analysis. It is intended that this work be repeated every year in order to follow developing trends and provide the most up-to-date information possible.

  20. Permeable pavement study (Edison)

    EPA Pesticide Factsheets

    While permeable pavement is increasingly being used to control stormwater runoff, field-based, side-by-side investigations on the effects different pavement types have on nutrient concentrations present in stormwater runoff are limited. In 2009, the U.S. EPA constructed a 0.4-ha parking lot in Edison, New Jersey, that incorporated permeable interlocking concrete pavement (PICP), pervious concrete (PC), and porous asphalt (PA). Each permeable pavement type has four, 54.9-m2, lined sections that direct all infiltrate into 5.7-m3 tanks enabling complete volume collection and sampling. This paper highlights the results from a 12-month period when samples were collected from 13 rainfall/runoff events and analyzed for nitrogen species, orthophosphate, and organic carbon. Differences in infiltrate concentrations among the three permeable pavement types were assessed and compared with concentrations in rainwater samples and impervious asphalt runoff samples, which were collected as controls. Contrary to expectations based on the literature, the PA infiltrate had significantly larger total nitrogen (TN) concentrations than runoff and infiltrate from the other two permeable pavement types, indicating that nitrogen leached from materials in the PA strata. There was no significant difference in TN concentration between runoff and infiltrate from either PICP or PC, but TN in runoff was significantly larger than in the rainwater, suggesting meaningful inter-event dry de

  1. Test Plan for Experimental Measurements of Radio Noise and Electromagnetic Interference at Logan and Burlington Airports

    DOT National Transportation Integrated Search

    1979-10-01

    A test plan is designed to" (a) evaluate the performance of several types of LORAN-C receivers in the vicinity of both a large metropolitan and a small rural airport, (b) measure the electromagnetic interference in the LORAN-C band (100+/-50 KHZ) at ...

  2. Pavement Performance : Approaches Using Predictive Analytics

    DOT National Transportation Integrated Search

    2018-03-23

    Acceptable pavement condition is paramount to road safety. Using predictive analytics techniques, this project attempted to develop models that provide an assessment of pavement condition based on an array of indictors that include pavement distress,...

  3. Pollutant load removal efficiency of pervious pavements: is clogging an issue?

    PubMed

    Kadurupokune, N; Jayasuriya, N

    2009-01-01

    Pervious pavements in car parks and driveways reduce the peak runoff rate and the quantity of runoff discharged into urban drains as well as improve the stormwater quality by trapping the sediments in the infiltrated water. The paper focuses on presenting results from the laboratory tests carried out to evaluate water quality improvements and effects of long-term decrease in infiltration rates with time due to sediments trapping (clogging) within the pavement pores. Clogging was not found to be a major factor affecting pervious pavement performance after simulating 17 years of stormwater quality samples.

  4. Performance of Kaolin Clay on the Concrete Pavement

    NASA Astrophysics Data System (ADS)

    Abdullah, M. E.; Jaya, R. P.; Shahafuddin, M. N. A.; Yaacob, H.; Ibrahim, M. H. Wan; Nazri, F. M.; Ramli, N. I.; Mohammed, A. A.

    2018-05-01

    This paper investigates the performance of concrete pavement containing kaolin clay with their engineering properties and to determine the optimum kaolin clay content. The concrete used throughout the study was designed as grade 30 MPa strength with constant water to cement ratio of 0.49. The compressive strength, flexural strength and water absorption test was conducted in this research. The concrete mix designed with kaolin clay as cement replacement comprises at 0%, 5%, 10% and 15% by the total weight of cement. The results indicate that the strength of pavement concrete decreases as the percentage of kaolin clay increases. It also shows that the water absorption increases with the percentage of cement replacement. However, 5% kaolin clay is found to be the optimum level to replace cement in a pavement concrete.

  5. Asphalt pavement surfaces and asphalt mixtures. Transportation research record

    DOE Office of Scientific and Technical Information (OSTI.GOV)

    NONE

    1996-12-31

    The papers in this volume, which deal with asphalt pavement surfaces and asphalt mixtures, should be of interest to state and local construction, design, materials, and research engineers as well as contractors and material producers. The papers in Part 1 include discussions of pavement smoothness specifications and skidding characteristics. The first four papers in Part 2 were submitted in response to a call for papers for a session at the 75th Annual Meeting of the Transportation Research Board on low-temperature properties of hot-mix asphalt. The next eight are on the influence of volumetric and strength properties on the performance ofmore » hot-mix asphalt. In the following three papers, the topics covered are the complex modulus of asphalt concrete, cold in-place asphalt recycling, and polymer modification of asphalt pavements in Ontario. The last two papers were presented in a session on relationship of materials characterization to accelerated pavement performance testing.« less

  6. Quieter pavements guidance document

    DOT National Transportation Integrated Search

    2013-02-01

    This report provides guidance and better practice recommendations to the National Park : Service for selecting pavement surfaces to minimize tire-pavement noise. The report : contains an overview of common technologies and methods for quieter pavemen...

  7. Consortium of accelerated pavement testers (CAPT).

    DOT National Transportation Integrated Search

    2016-05-01

    FHWA and a group of state Departments of Transportation from nine of the 14 US Accelerated : Pavement Testing (APT) facilities have proposed the creation of a joint or pooled funded program to : encourage coordination among the various facilities and...

  8. Material Testing and Initial Pavement Design Modeling: Minnesota Road Research Project

    DOT National Transportation Integrated Search

    1996-09-01

    Between January 1990 and December 1994, a study verified and applied a Corps of Engineers-developed mechanistic design and evaluation method for pavements in seasonal frost areas as part of a Construction Productivity Advancement Research (CPAR) proj...

  9. Effective flow resistivity of highway pavements.

    PubMed

    Rochat, Judith L; Read, David R

    2013-12-01

    In the case of highway traffic noise, propagating sound is influenced by the ground over which it travels, whether it is the pavement itself or the ground between the highway and nearby communities. Properly accounting for ground type in modeling can increase accuracy in noise impact determinations and noise abatement design. Pavement-specific effective flow resistivity values are being investigated for inclusion in the Federal Highway Administration Traffic Noise Model, which uses these values in the sound propagation algorithms and currently applies a single effective flow resistivity value to all pavement. Pavement-specific effective flow resistivity values were obtained by applying a modified version of the American National Standards Institute S1.18 standard. The data analysis process was tailored to allow for increased sensitivity and extraction of effective flow resistivity values for a broad range of pavements (sound absorptive to reflective). For porous pavements (sound absorptive), it was determined that examination of the measured data can reveal influence from an underlying structure. Use of such techniques can aid in the design of quieter pavements.

  10. New MagViz Airport Liquid Analysis System Undergoes Testing

    DOE Office of Scientific and Technical Information (OSTI.GOV)

    None

    2008-12-18

    LOS ALAMOS, New Mexico, December 16, 2008—An innovative application of a technology first used for medical imaging may enhance airport security if Los Alamos National Laboratory scientists are successful. Los Alamos technologists have adapted Magnetic Res

  11. Concrete pavement joint deterioration.

    DOT National Transportation Integrated Search

    2015-12-01

    Concrete pavements are an important part of our national infrastructure. In recent years the relatively small number of reported joints deteriorating prematurely in concrete pavements around Indiana has increased. Changes over the past 45 years in IN...

  12. Identification of pavement distress in Kentucky.

    DOT National Transportation Integrated Search

    2006-04-01

    In Kentucky, the roads are comprised primarily of two types of pavement. The first being Portland Cement Concrete (PCC) a rigid pavement, and the other is Asphaltic Concrete (AC), a flexible pavement. There is a noticeable difference in their appeara...

  13. Quantification of smoothness index differences related to long-term pavement performance equipment type

    DOT National Transportation Integrated Search

    2005-09-01

    The Long-Term Pavement Performance (LTPP) program was designed as a 20-year study of pavement performance. A major data collection effort at LTPP test sections is the collection of longitudinal profile data using inertial profilers. Three types of in...

  14. The Correlations between Airport Sustainability and Indonesian Economic Growth

    NASA Astrophysics Data System (ADS)

    Setiawan, M. I.; Dhaniarti, I.; Utomo, W. M.; Sukoco, A.; Mudjanarko, S. W.; Hasyim, C.; Prasetijo, J.; Kurniasih, N.; Wajdi, M. B. N.; Purworusmiardi, T.; Suyono, J.; Sudapet, I. N.; Nasihien, R. D.; Wulandari, D. A. R.; Ade, R. T.; Atmaja, W. M. T.; Sugeng; Wulandari, A.

    2018-04-01

    This study aims to analyze the correlation between airport performances with Gross domestic product-regional (GDP-regional) performance. This research uses quantitative research method with correlation study approach. Based on the T-Value Test Result, the T-value for the Airport Performance variable is 14,264. T-Value Test Results and compared with T-table equal to 1,976 (significant level 0,05) hence T-count> T-table so variable of Airport Perform predicted have significant correlation to GDP-regional. This means that good airport performance will either improve the performance of Water supply, Sewerage, Waste Management and Remediation Activities; Wholesale and Retail Trade; Repair of Motor Vehicles and Motorcycles; Accommodation and Food Service Activities; Financial and Insurance Activities; Business Activities; Public Administration and Defence; Compulsory Social Security; Education; Human Health and Social Work Activities; Other Services Activities; Manufacturing; and Electricity and Gas, better.

  15. Asphaltic concrete pavement survey.

    DOT National Transportation Integrated Search

    1963-04-01

    The ever increasing problem of wheel path rutting and excessive desification of asphaltic concrete pavement has been the subject of asphalt technology for quite sometime. It is known that the density of the pavement, which is significant for several ...

  16. Whiffing the Airport Interview

    ERIC Educational Resources Information Center

    Williamson, David

    2008-01-01

    An airport interview is an initial interview for a senior administrative position conducted at an airport hotel not too far from the campus in question. Meeting at an airport enables a search committee to interview a large number of candidates in a short period of time with a degree of confidentiality. At the conclusion of the airport interviews,…

  17. New MagViz Airport Liquid Analysis System Undergoes Testing

    ScienceCinema

    None

    2017-12-09

    LOS ALAMOS, New Mexico, December 16, 2008—An innovative application of a technology first used for medical imaging may enhance airport security if Los Alamos National Laboratory scientists are successful. Los Alamos technologists have adapted Magnetic Res

  18. Collision Avoidance for Airport Traffic Simulation Evaluation

    NASA Technical Reports Server (NTRS)

    Jones, Denise R.; Prinzel, Lawrence J., III; Shelton, Kevin J.; Bailey, Randall E.; Otero, Sharon D.; Barker, Glover D.

    2010-01-01

    A Collision Avoidance for Airport Traffic (CAAT) concept for the airport Terminal Maneuvering Area (TMA) was evaluated in a simulation study at the National Aeronautics and Space Administration (NASA) Langley Research Center. CAAT is being designed to enhance surface situation awareness and provide cockpit alerts of potential conflicts during runway, taxi, and low altitude air-to-air operations. The purpose of the study was to evaluate pilot reaction to conflict events in the TMA near the airport, different alert timings for various scenarios, alerting display concepts, and directive alerting concepts. This paper gives an overview of the conflict detection and resolution (CD&R) concept, simulation study, and test results

  19. Development of Pavement Temperature Contours for India

    NASA Astrophysics Data System (ADS)

    Nivitha, M. R.; Krishnan, J. M.

    2014-06-01

    The stress-strain response of the bituminous pavements is highly sensitive to temperature. To systematically analyze the pavement performance, it is necessary that one understands the variation of pavement temperature spatially and temporally during the life time of a pavement. In this investigation, historic air temperature data for 37 locations across India was collected. Using this database, pavement temperature data was predicted by an appropriate air temperature-pavement temperature model. High and low temperature pavement temperature contours were generated for the first time for India. It was seen that the locations spanning from Srinagar to Madhya Pradesh and Rajasthan to Orissa were extremely critical. The minimum temperature in these locations was 10 C and the maximum temperature was around 68 C. Clearly such information is necessary when making choice of binder grade and bituminous layer thickness.

  20. Efficient airport detection using region-based fully convolutional neural networks

    NASA Astrophysics Data System (ADS)

    Xin, Peng; Xu, Yuelei; Zhang, Xulei; Ma, Shiping; Li, Shuai; Lv, Chao

    2018-04-01

    This paper presents a model for airport detection using region-based fully convolutional neural networks. To achieve fast detection with high accuracy, we shared the conv layers between the region proposal procedure and the airport detection procedure and used graphics processing units (GPUs) to speed up the training and testing time. For lack of labeled data, we transferred the convolutional layers of ZF net pretrained by ImageNet to initialize the shared convolutional layers, then we retrained the model using the alternating optimization training strategy. The proposed model has been tested on an airport dataset consisting of 600 images. Experiments show that the proposed method can distinguish airports in our dataset from similar background scenes almost real-time with high accuracy, which is much better than traditional methods.

  1. 77 FR 4394 - Release of Airport Property: Orlando Executive Airport, Orlando, FL

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-01-27

    ... DEPARTMENT OF TRANSPORTATION Federal Aviation Administration Release of Airport Property: Orlando Executive Airport, Orlando, FL AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Request for... 12.4 acres at the Orlando Executive Airport, Orlando, FL from the conditions, release certain...

  2. Developing a GDOT pavement marking handbook using field test deck evaluation and long-term performance analysis : final report.

    DOT National Transportation Integrated Search

    2015-12-01

    This research project comprehensively reviewed the state departments of transportations (DOTs) practices on : selecting and inspecting pavement marking materials (PMMs) and evaluated pavement marking : retroreflectivity data collected on the Georg...

  3. Runway Incursion Prevention System: Demonstration and Testing at the Dallas/Fort Worth International Airport

    NASA Technical Reports Server (NTRS)

    Jones, Denise R.; Quach, Cuong C.; Young, Steven D.

    2007-01-01

    A Runway Incursion Prevention System (RIPS) was tested at the Dallas-Ft. Worth International Airport (DFW) in October 2000. The system integrated airborne and ground components to provide both pilots and controllers with enhanced situational awareness, supplemental guidance cues, a real-time display of traffic information, and warning of runway incursions in order to prevent runway incidents while also improving operational capability. A series of test runs was conducted using NASA s Boeing 757 research aircraft and a test van equipped to emulate an incurring aircraft. The system was also demonstrated to over 100 visitors from the aviation community. This paper gives an overview of the RIPS, DFW flight test activities, and quantitative and qualitative results of the testing.

  4. Performance of warranted asphalt pavements : smoothness and performance of Indiana warranted asphalt pavements.

    DOT National Transportation Integrated Search

    2016-06-01

    In the early 1990s the Indiana Department of Transportation (INDOT) developed a five-year warranty specification for asphalt pavements : with the first project being built in 1996. In 2004, results indicated that the asphalt pavements built with the ...

  5. Productivity Analysis of Public and Private Airports: A Causal Investigation

    NASA Technical Reports Server (NTRS)

    Vasigh, Bijan; Gorjidooz, Javad

    2007-01-01

    Around the world, airports are being viewed as enterprises, rather than public services, which are expected to be managed efficiently and provide passengers with courteous customer services. Governments are, increasingly, turning to the private sectors for their efficiency in managing the operation, financing, and development, as well as providing security for airports. Operational and financial performance evaluation has become increasingly important to airport operators due to recent trends in airport privatization. Assessing performance allows the airport operators to plan for human resources and capital investment as efficiently as possible. Productivity measurements may be used as comparisons and guidelines in strategic planning, in the internal analysis of operational efficiency and effectiveness, and in assessing the competitive position of an airport in transportation industry. The primary purpose of this paper is to investigate the operational and financial efficiencies of 22 major airports in the United States and Europe. These airports are divided into three groups based on private ownership (7 British Airport Authority airports), public ownership (8 major United States airports), and a mix of private and public ownership (7 major European Union airports. The detail ownership structures of these airports are presented in Appendix A. Total factor productivity (TFP) model was utilized to measure airport performance in terms of financial and operational efficiencies and to develop a benchmarking tool to identify the areas of strength and weakness. A regression model was then employed to measure the relationship between TFP and ownership structure. Finally a Granger causality test was performed to determine whether ownership structure is a Granger cause of TFP. The results of the analysis presented in this paper demonstrate that there is not a significant relationship between airport TFP and ownership structure. Airport productivity and efficiency is

  6. November 1996 Kennedy Airport Wake Vortex Test : Sensor Evaluation

    DOT National Transportation Integrated Search

    1997-08-01

    In November 1996, a number of wake vortex and meteorological sensors were operated simultaneously in the middle marker region of Runway 31R at New York's Kennedy Airport. The vortex sensors included: 1)ground-based anemometer array, 2) cw 10-micron l...

  7. Evaluation and verification of two systems for mechanistic structural design of asphalt concrete pavements in Nebraska

    NASA Astrophysics Data System (ADS)

    Sneddon, R. V.

    1982-07-01

    The VESY-3-A mechanistic design system for asphalt pavements was field verified for three pavement sections at two test sites in Nebraska. PSI predictions from VESYS were in good agreement with field measurements for a 20 year old 3 layer pavement located near Elmwood, Nebraska. Field measured PSI values for an 8 in. full depth pavement also agreed with VESYS predictions for the study period. Rut depth estimates from the model were small and were in general agreement with field measurements. Cracking estimates were poor and tended to underestimate the time required to develop observable fatigue cracking in the field. Asphalt, base course and subgrade materials were tested in a 4.0 in. diameter modified triaxial cell. Test procedures used dynamic conditioning and rest periods to simulate service conditions.

  8. Assessment of low temperature cracking in asphalt pavement mixes and rheological performance of asphalt binders

    NASA Astrophysics Data System (ADS)

    Sowah-Kuma, David

    Government spends a lot of money on the reconstruction and rehabilitation of road pavements in any given year due to various distresses and eventual failure. Low temperature (thermal) cracking, one of the main types of pavement distress, contributes partly to this economic loss, and comes about as a result of accumulated tensile strains exceeding the threshold tensile strain capacity of the pavement. This pavement distress leads to a drastic reduction of the pavement's service life and performance. In this study, the severity of low temperature (thermal) cracking on road pavements selected across the Province of Ontario and its predicted time to failure was assessed using the AASTHO Mechanistic-Empirical Pavement Design Guide (MEPDG) and AASHTOWARE(TM) software, with inputs such as creep compliance and tensile strength from laboratory test. Highway 400, K1, K2, Y1, Sasobit, Rediset LQ, and Rediset WMX were predicted to have a pavement in-service life above 15 years. Additionally, the rheological performance of the recovered asphalt binders was assessed using Superpave(TM) tests such as the dynamic shear rheometer (DSR) and bending beam rheometer (BBR). Further tests using modified standard protocols such as the extended bending beam rheometer (eBBR) (LS-308) test method and double-edge notched tension (DENT) test (LS-299) were employed to evaluate the failure properties associated with in service performance. The various rheological tests showed K1 to be the least susceptible to low temperature cracking compared to the remaining samples whiles Highway 24 will be highly susceptible to low temperature cracking. X-ray fluorescence (XRF) analysis was performed on the recovered asphalt binders to determine the presence of metals such as zinc (Zn) and molybdenum (Mo) believed to originate from waste engine oil, which is often added to asphalt binders. Finally, the severity of oxidative aging (hardening) of the recovered asphalt binders was also evaluated using the

  9. Evaluation of Long-Term Pavement Performance (LTTP) Climatic Data for Use in Mechanistic-Empirical Pavement Design Guide (MEPDG) Calibration and Other Pavement Analysis

    DOT National Transportation Integrated Search

    2015-05-01

    Improvements in the Long-Term Pavement Performance (LTPP) Programs climate data are needed to support current and future research into climate effects on pavement materials, design, and performance. The calibration and enhancement of the Mechanist...

  10. Application of high performance concrete in the pavement system : structural response of high performance concrete pavement : executive summary.

    DOT National Transportation Integrated Search

    2002-01-01

    Rigid pavements make up a significant percentage of highway systems in the United States and abroad. Concrete pavements provide an economical and durable solution for highway systems, because the pavements last longer and require less maintenance. Re...

  11. Assessment of highway pavements using GPR

    NASA Astrophysics Data System (ADS)

    Plati, Christina; Loizos, Andreas

    2015-04-01

    Highway infrastructure is a prerequisite for a functioning economy and social life. Highways, often prone to congestion and disruption, are one of the aspects of a modern transport network that require maximum efficiency if an integrated transport network, and sustainable mobility, is to be achieved. Assessing the condition of highway structures, to plan subsequent maintenance, is essential to allow the long-term functioning of a road network. Optimizing the methods used for such assessment will lead to better information being obtained about the road and underlying ground conditions. The condition of highway structures will be affected by a number of factors, including the properties of the highway pavement, the supporting sub-base and the subgrade (natural ground), and the ability to obtain good information about the entire road structure, from pavement to subgrade, allows appropriate maintenance programs to be planned. The maintenance of highway pavements causes considerable cost and in many cases obstruction to traffic flow. In this situation, methods that provide information on the present condition of pavement structure non-destructively and economically are of great interest. It has been shown that Ground-Penetrating-Radar (GPR), which is a Non Destructive Technique (NDT), can deliver information that is useful for the planning of pavement maintenance activities. More specifically GPR is used by pavement engineers in order to determine physical properties and characteristics of the pavement structure, information that is valuable for the assessment of pavement condition. This work gives an overview on the practical application of GPR using examples from highway asphalt pavements monitoring. The presented individual applications of GPR pavement diagnostics concern structure homogeneity, thickness of pavement layers, dielectric properties of asphalt materials etc. It is worthwhile mentioning that a number of applications are standard procedures, either

  12. Guide to cement-based integrated pavement solutions.

    DOT National Transportation Integrated Search

    2011-08-01

    This guide provides a clear, concise, and cohesive presentation of cement-bound materials options for 10 : specific engineering pavement applications: new concrete pavements, concrete overlays, pervious concrete, : precast pavements, roller-compacted...

  13. Optimization and standardization of pavement management processes.

    DOT National Transportation Integrated Search

    2004-08-01

    This report addresses issues related to optimization and standardization of current pavement management processes in Kentucky. Historical pavement management records were analyzed, which indicates that standardization is necessary in future pavement ...

  14. The Impact of Airport Performance towards Construction and Infrastructure Expansion in Indonesia

    NASA Astrophysics Data System (ADS)

    Laksono, T. D.; Kurniasih, N.; Hasyim, C.; Setiawan, M. I.; Ahmar, A. S.

    2018-01-01

    Development that is generated from airport areas includes construction and infrastructure development. This research reviews about how the implementation of material management in certain construction project and the relationship between development especially construction and infrastructure development with Airport Performance. The method that is used in this research is mixed method. The population in this research is 297 airports that are existed in Indonesia. From those 297 airports then it is chosen airports that have the most completed data about construction project and it is obtained 148 airports. Based on the coefficient correlation (R) test it is known that construction and infrastructure development has relatively strong relation with airport performance variable, but there are still other factors that influence construction and infrastructure development become bigger effect.

  15. Engineering properties of resin modified pavement (RMP) for mechanistic design

    NASA Astrophysics Data System (ADS)

    Anderton, Gary Lee

    1997-11-01

    The research study described in this report focuses on determining the engineering properties of the resin modified pavement (RMP) material relating to pavement performance, and then developing a rational mechanistic design procedure to replace the current empirical design procedure. A detailed description of RMP is provided, including a review of the available literature on this relatively new pavement technology. Field evaluations of four existing and two new RMP project sites were made to assess critical failure modes and to obtain pavement samples for subsequent laboratory testing. Various engineering properties of laboratory-produced and field-recovered samples of RMP were measured and analyzed. The engineering properties evaluated included those relating to the material's stiffness, strength, thermal properties, and traffic-related properties. Comparisons of these data to typical values for asphalt concrete and portland cement concrete were made to relate the physical nature of RMP to more common pavement surfacing materials. A mechanistic design procedure was developed to determine appropriate thickness profiles of RMP, using stiffness and fatigue properties determined by this study. The design procedure is based on the U.S. Army Corps of Engineers layered elastic method for airfield flexible pavements. The WESPAVE computer program was used to demonstrate the new design procedure for a hypothetical airfield apron design. The results of the study indicated that RMP is a relatively stiff, viscoelastic pavement surfacing material with many of its strength and stiffness properties falling between those of typical asphalt concrete and portland cement concrete. The RMP's thermal and traffic-related properties indicated favorable field performance. The layered elastic design approach appeared to be a reasonable and practical method for RMP mechanistic pavement design, and this design procedure was recommended for future use and development.

  16. Pavement temperature and burns: streets of fire.

    PubMed

    Harrington, W Z; Strohschein, B L; Reedy, D; Harrington, J E; Schiller, W R

    1995-11-01

    To measure pavement temperatures over a 24-hour period to determine when patients are at risk for burns and to report cases of pavement burns with predisposing factors. Descriptive study of pavement temperatures and retrospective case series of 23 patients with pavement burns admitted to the Maricopa Medical Center during the years 1986 to 1992. Twenty-three patients with pavement burns serious enough for them to be admitted to the burn center. We measured the temperatures of asphalt, cement, and other outdoor materials hourly for one 24-hour period using a thermocouple thermometer. Asphalt pavement was hot enough to cause burns from 9 AM to 7 PM during the summer months. It was hot enough to cause a second-degree burn within 35 seconds from 10 AM to 5 PM. The group of burned patients could be divided into three categories: incapacitated, restrained, and sensory deficient. All burns involved less than 13% of the total body surface area. During summer days in the desert, pavement is often hot enough to cause burns and does so with regularity in the southwestern United States. No one should be allowed to remain in contact with hot pavement, even transiently.

  17. Positioning System Accuracy Assessment for the Runway Incursion Prevention System Flight Test at the Dallas/Ft. Worth International Airport

    NASA Technical Reports Server (NTRS)

    Quach, Cuong C.

    2004-01-01

    NASA/Langley Research Center collaborated with the Federal Aviation Administration (FAA) to test a Runway Incursion Prevention System (RIPS) at the Dallas Fort Worth International Airport (DFW) in October 2000. The RIPS combines airborne and ground sensor data with various cockpit displays to improve pilots' awareness of traffic conditions on the airport surface. The systems tested at DFW involved surface radar and data systems that gather and send surface traffic information to a research aircraft outfitted with the RIPS software, cockpit displays, and data link transceivers. The data sent to the airborne systems contained identification and GPS location of traffic. This information was compared with the own-ship location from airborne GPS receivers to generate incursion alerts. A total of 93 test tracks were flown while operating RIPS. This report compares the accuracy of the airborne GPS systems that gave the own-ship position of the research aircraft for the 93 test tracks.

  18. Texas flexible pavements and overlays : calibration plans for M-E models and related software.

    DOT National Transportation Integrated Search

    2013-06-01

    This five-year project was initiated to collect materials and pavement performance data on a minimum of 100 highway test sections around the State of Texas, incorporating flexible pavements and overlays. Besides being used to calibrate and validate m...

  19. Layer moduli of Nebraska pavements for the new Mechanistic-Empirical Pavement Design Guide (MEPDG).

    DOT National Transportation Integrated Search

    2010-12-01

    As a step-wise implementation effort of the Mechanistic-Empirical Pavement Design Guide (MEPDG) for the design : and analysis of Nebraska flexible pavement systems, this research developed a database of layer moduli dynamic : modulus, creep compl...

  20. MoDOT pavement preservation research program volume IV, pavement evaluation tools-data collection methods.

    DOT National Transportation Integrated Search

    2015-10-01

    The overarching goal of the MoDOT Pavement Preservation Research Program, Task 3: Pavement Evaluation Tools Data : Collection Methods was to identify and evaluate methods to rapidly obtain network-level and project-level information relevant to :...

  1. Empirical prediction of mechanical properties of flexible pavement through GPR

    NASA Astrophysics Data System (ADS)

    Bianchini Ciampoli, Luca; Benedetto, Andrea

    2017-04-01

    To date, it is well known that the frequency of accidental events recorded on a road, is related to the deterioration rate of its pavement. In this sense, the monitoring of the pavement health over a road network is a crucial task for the administrations, to define a priority scale for maintenance works, and accordingly to lower the risk of accidents. Several studies suggest the possibility to employ Ground-penetrating Radar (GPR) to overcome the limits of traditional bearing tests, which due to their low productivity and high costs, can only give a discrete knowledge about the strength of the pavement. This work presents a GPR-based empirical model for the prediction of the bearing capacity of a road pavement, expressed as Young's Modulus. The model exploits the GPR to extract information on the thickness of the base course and the clay content, by referring to the signal velocity and attenuation, respectively. To test the effectiveness of the model, experimental activities have been accounted for. In particular, multi-frequency GPR tests have been performed along road sections of rural roads, composed of a flexible pavement, for a total of 45 Km. As ground-truth, light falling weight deflectometer (LFWD) and Curviameter have been employed. Both the electromagnetic and the mechanical datasets have been properly processed, in order to reduce misinterpretations and to raise the statistical significance of the procedure. Hence, the calibration of the parameters composing the model was run in a subsection, equal to 8% of the total length, randomly selected within the surveyed track. Finally, as validation, the model has been applied to the whole analysed dataset. As a result, the empirical model showed a good effectiveness in predicting the mechanical response of the pavement, with a normalised root mean squared deviation equal to 0.27. Finally, by averaging the measured and predicted mechanical data every 50 m and sorting the results into strength classes, a

  2. Pavement maintenance optimization model using Markov Decision Processes

    NASA Astrophysics Data System (ADS)

    Mandiartha, P.; Duffield, C. F.; Razelan, I. S. b. M.; Ismail, A. b. H.

    2017-09-01

    This paper presents an optimization model for selection of pavement maintenance intervention using a theory of Markov Decision Processes (MDP). There are some particular characteristics of the MDP developed in this paper which distinguish it from other similar studies or optimization models intended for pavement maintenance policy development. These unique characteristics include a direct inclusion of constraints into the formulation of MDP, the use of an average cost method of MDP, and the policy development process based on the dual linear programming solution. The limited information or discussions that are available on these matters in terms of stochastic based optimization model in road network management motivates this study. This paper uses a data set acquired from road authorities of state of Victoria, Australia, to test the model and recommends steps in the computation of MDP based stochastic optimization model, leading to the development of optimum pavement maintenance policy.

  3. Cloud Impacts on Pavement Temperature in Energy Balance Models

    NASA Astrophysics Data System (ADS)

    Walker, C. L.

    2013-12-01

    Forecast systems provide decision support for end-users ranging from the solar energy industry to municipalities concerned with road safety. Pavement temperature is an important variable when considering vehicle response to various weather conditions. A complex, yet direct relationship exists between tire and pavement temperatures. Literature has shown that as tire temperature increases, friction decreases which affects vehicle performance. Many forecast systems suffer from inaccurate radiation forecasts resulting in part from the inability to model different types of clouds and their influence on radiation. This research focused on forecast improvement by determining how cloud type impacts the amount of shortwave radiation reaching the surface and subsequent pavement temperatures. The study region was the Great Plains where surface solar radiation data were obtained from the High Plains Regional Climate Center's Automated Weather Data Network stations. Road pavement temperature data were obtained from the Meteorological Assimilation Data Ingest System. Cloud properties and radiative transfer quantities were obtained from the Clouds and Earth's Radiant Energy System mission via Aqua and Terra Moderate Resolution Imaging Spectroradiometer satellite products. An additional cloud data set was incorporated from the Naval Research Laboratory Cloud Classification algorithm. Statistical analyses using a modified nearest neighbor approach were first performed relating shortwave radiation variability with road pavement temperature fluctuations. Then statistical associations were determined between the shortwave radiation and cloud property data sets. Preliminary results suggest that substantial pavement forecasting improvement is possible with the inclusion of cloud-specific information. Future model sensitivity testing seeks to quantify the magnitude of forecast improvement.

  4. Evaluation Model for Pavement Surface Distress on 3d Point Clouds from Mobile Mapping System

    NASA Astrophysics Data System (ADS)

    Aoki, K.; Yamamoto, K.; Shimamura, H.

    2012-07-01

    This paper proposes a methodology to evaluate the pavement surface distress for maintenance planning of road pavement using 3D point clouds from Mobile Mapping System (MMS). The issue on maintenance planning of road pavement requires scheduled rehabilitation activities for damaged pavement sections to keep high level of services. The importance of this performance-based infrastructure asset management on actual inspection data is globally recognized. Inspection methodology of road pavement surface, a semi-automatic measurement system utilizing inspection vehicles for measuring surface deterioration indexes, such as cracking, rutting and IRI, have already been introduced and capable of continuously archiving the pavement performance data. However, any scheduled inspection using automatic measurement vehicle needs much cost according to the instruments' specification or inspection interval. Therefore, implementation of road maintenance work, especially for the local government, is difficult considering costeffectiveness. Based on this background, in this research, the methodologies for a simplified evaluation for pavement surface and assessment of damaged pavement section are proposed using 3D point clouds data to build urban 3D modelling. The simplified evaluation results of road surface were able to provide useful information for road administrator to find out the pavement section for a detailed examination and for an immediate repair work. In particular, the regularity of enumeration of 3D point clouds was evaluated using Chow-test and F-test model by extracting the section where the structural change of a coordinate value was remarkably achieved. Finally, the validity of the current methodology was investigated by conducting a case study dealing with the actual inspection data of the local roads.

  5. Desert Pavement Studies

    DTIC Science & Technology

    2003-11-30

    Desert Pavement: an Environmental Canary? P. K. Haff Journal of Geology, 109, 661-668, 2001. Neogeomorphology , Prediction , and the Anthropic ... Landscape P. K. Haff AGU special publication Prediction in Geomorphology, in press 2003. Neogeomorphology P. K. Haff EOS, 83, p310, p317, 2002... landscape (a fact that underlies their stability). The problem is to understand what pavements are likely to do when disturbed in certain ways, for

  6. Characterization and Modeling of Recycled Pavement Sections

    DOT National Transportation Integrated Search

    2017-12-01

    Because of its documented cost and environmental benefits, cold central plant recycling (CCPR) has attracted the interest of local and state departments of transportation. In 2015 two test pavement sections with CCPR as base layers were constructed a...

  7. Evaluation of bond strength between pavement layers.

    DOT National Transportation Integrated Search

    2005-12-01

    The primary objective of this project was to develop a test for measuring the bond strength : between pavement layers. The research was also to evaluate tack coat materials and application : rates for the Alabama Department of Transportation (ALDOT)....

  8. Evaluation of multilayered pavement structures from measurements of surface waves

    USGS Publications Warehouse

    Ryden, N.; Lowe, M.J.S.; Cawley, P.; Park, C.B.

    2006-01-01

    A method is presented for evaluating the thickness and stiffness of multilayered pavement structures from guided waves measured at the surface. Data is collected with a light hammer as the source and an accelerometer as receiver, generating a synthetic receiver array. The top layer properties are evaluated with a Lamb wave analysis. Multiple layers are evaluated by matching a theoretical phase velocity spectrum to the measured spectrum. So far the method has been applied to the testing of pavements, but it may also be applicable in other fields such as ultrasonic testing of coated materials. ?? 2006 American Institute of Physics.

  9. The Airport Network Flow Simulator.

    DOT National Transportation Integrated Search

    1976-05-01

    The impact of investment at an individual airport is felt through-out the National Airport System by reduction of delays at other airports in the the system. A GPSS model was constructed to simulate the propagation of delays through a nine-airport sy...

  10. Airport Ground Access Study

    DOT National Transportation Integrated Search

    1978-03-02

    In response to a request by Congress, the FAA and TSC have undertaken a study to determine the extent to which inadequate (off-airport) ground access to airports constrains airport capacity and air travel. Presently, TSC is preparing case studies of ...

  11. Motorist actions at a crosswalk with an in-pavement flashing light system.

    PubMed

    Karkee, Ganesh J; Nambisan, Shashi S; Pulugurtha, Srinivas S

    2010-12-01

    An in-pavement flashing light system is used at crosswalks to alert motorists and pedestrians of possible conflicts and to influence their behavior to enhance safety. The relative behaviors of the drivers and the pedestrians affect safety. An evaluation of motorist behavior at a pedestrian crosswalk with an in-pavement flashing light system is presented in this manuscript. Field observations provide the basis to evaluate motorist behavior at a crosswalk with an in-pavement flashing light system. Outcomes of pedestrian and motorists actions were observed to quantify measures of effectiveness (MOEs) such as yielding behavior of motorists, vehicle speeds, and yielding distance from the crosswalk. A before-and-after study design was used. The before condition was prior to the activation of the in-pavement flashing light system and the after condition was after the activation of the in-pavement flashing light system. The study was conducted on a relatively low-volume roadway located in the Henderson, Nevada. The significance of the differences in the MOEs between the 2 study periods was evaluated using statistical analysis tools such as a one-tailed test for proportions and the Welch-Satterthwaite t-test. The results show that the installation of the in-pavement flashing light system increased the yielding behavior of motorists significantly (P < 0.001). The vehicular speeds decreased when pedestrians were waiting at the curb to cross and when they were crossing (P < 0.001). Motorists yielded to pedestrians on an average about 3 m (∼10 feet) upstream from the yield markings and the yielding distances were consistent in both directions. The in-pavement flashing light system is seen to be effective to improve motorists' yielding behavior and the speeds of vehicles were also observed to decrease in the presence of pedestrians.

  12. 76 FR 31823 - Technical Amendment to List of User Fee Airports: Addition of Dallas Love Field Municipal Airport...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-06-02

    ...] Technical Amendment to List of User Fee Airports: Addition of Dallas Love Field Municipal Airport, Dallas... fee airport designation for Dallas Love Field Municipal Airport, in Dallas, Texas. User fee airports... Love Field Municipal Airport. This document updates the list of user fee airports by adding Dallas Love...

  13. A guide for local agency pavement managers

    DOT National Transportation Integrated Search

    1994-12-01

    The purpose of this guide is to provide Washington's local agencies with a practical document that will assist pavement managers in understanding the pavement management process and the steps necessary to implement their own pavement management syste...

  14. Pavement profile viewer and analyzer : product brief.

    DOT National Transportation Integrated Search

    2003-06-01

    Pavement Profile Viewer and Analyzer, or ProVAL, is a software package that imports, displays, and analyzes the characteristics of pavement profiles from many different sources. ProVAL can analyze pavement profiles using several methods, including In...

  15. Integration and Evaluation of Automated Pavement Distress Data in INDOT’s Pavement Management System

    DOT National Transportation Integrated Search

    2017-05-01

    This study was in two parts. The first part established and demonstrated a framework for pavement data integration. This is critical for fulfilling QC/QA needs of INDOTs pavement management system, because the precision of the physical location re...

  16. Strength and deformation characteristics of pavements

    NASA Astrophysics Data System (ADS)

    Shook, J. F.; Kallas, B. F.; McCullough, B. F.; Taute, A.; Rada, G.; Witczak, M. W.; Heisey, J. S.; Stokoe, K. H.; Meyer, A. H.; Huffman, M. S.

    The Colorado experimental base project was a full-scale field experment constructed with various thicknesses of two full depth hot mix sand asphalt beans, one full depth asphalt concrete base, and one thickness of a standard design with untreated base and subbase layers. Relative thicknesses of one asphalt concrete base, two hot mix sand asphalt bases, and one standard design with untreated base and subbase required to give an equal level of pavement performance were determined. Certain measured properties of the pavement and the pavement components were related to observed levels of performance by using both empirical and theoretical models for pavement behavior.

  17. Evaluation of nondestructive evaluation methods for application in early detection Of deterioration in concrete pavements

    DOT National Transportation Integrated Search

    2000-01-01

    Three nondestructive evaluation (NDE) methods for concrete pavements - surface ultrasonic pulse velocity measurements (UPV), the impact-echo (IE) method, and the use of a seismic pavement analyzer (SPA) - were tested on six sections of two continuous...

  18. 78 FR 7476 - Airport Improvement Program

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-02-01

    ... of Airport Planning and Programming, Financial Assistance Division has updated and significantly.... San Martin, Manager, Airports Financial Assistance Division, Office of Airport Planning and... Airports, Airport Planning and Programming, Routing Symbol APP-501, 800 Independence Avenue SW., Room 619...

  19. Recycled asphalt pavement - fly ash geopolymer as a sustainable stabilized pavement material

    NASA Astrophysics Data System (ADS)

    Horpibulsuk, S.; Hoy, M.; Witchayaphong, P.; Rachan, R.; Arulrajah, A.

    2017-11-01

    Strength, durability, microstructure and leachate characteristics of Recycled Asphalt Pavement and Fly Ash (RAP-FA) geopolymers and RAP-FA blends as a sustainable pavement material are evaluated in this paper. The strength development of the stabilized materials with and without effect wetting-drying (w-d) cycles was determined by Unconfined Compression Strength (UCS) test. The mineralogical and microstructural changes of the stabilized material were analyzed by X-Ray Diffraction (XRD) and Scanning Electron Microscopy (SEM). The leachability of the heavy metals were measured by Toxicity Characteristic Leaching Procedure (TCLP) and compared with international standard. The results show that both RAP-FA blend and RAP-FA geopolymer increase with increasing the number of w-d cycles (C), reaching its peak at 6 w-d cycles. The XRD and SEM analyses indicate that the strength development of RAP-FA blend occurs due to stimulation of the chemical reaction between the high amount to Calcium in RAP and the high amount of Silica and Alumina in FA leaching to production of Calcium Aluminium (Silicate) Hydrate, while the geopolymerization reaction is observed in RAP-FA geopolymer. For C> 6, the significant macro- and micro-cracks developed during w-d cycles cause strength reduction for both RAP-FA blend and geopolymer. The TCLP results demonstrate that there is no environmental risk for these stabilized materials. Furthermore, FA-geopolymer can reduce the leachability of heavy metal in RAP-FA blend. The outcome from this research confirms the viability of using RAP-FA blend and RAP-FA geopolymer as alternative sustainable pavement materials.

  20. Advanced Pavement Design: Finite Element Modeling for Rigid Pavement Joints, Report II: Model Development

    DOT National Transportation Integrated Search

    1998-03-01

    The contribution of a cement-stabilized base course to the strength of the rigid pavement structure is poorly understood. The objective of this research was to obtain data on the response of the rigid pavement slab-joint-foundation system by conducti...

  1. Pervious Pavement System Evaluation-Poster

    EPA Science Inventory

    Pervious pavement is a low impact development stormwater control. The Environmental Protection Agency's Urban Watershed Management Branch is evaluating interlocking concrete pavingstone pervious pavement systems. The pavingstones themselves are impermeable, but the spaces between...

  2. The impact of airport characteristics on airport surface accidents and incidents.

    PubMed

    Wilke, Sabine; Majumdar, Arnab; Ochieng, Washington Y

    2015-06-01

    Airport surface safety and in particular runway and taxiway safety is acknowledged globally as one of aviation's greatest challenges. To improve this key area of aviation safety, it is necessary to identify and understand the causal and contributing factors on safety occurrences. While the contribution of human factors, operations, and procedures has been researched extensively, the impact of the airport and its associated characteristics itself has received little or no attention. This paper introduces a novel methodology for risk and hazard assessment of airport surface operations, and models the relationships between airport characteristics, and (a) the rate of occurrences, (b) the severity of occurrences, and (c) the causal factors underlying occurrences. The results show for the first time how the characteristics of airports, and in particular its infrastructure and operations, influence the safety of surface operations. Copyright © 2015 Elsevier Ltd. and National Safety Council. Published by Elsevier Ltd. All rights reserved.

  3. Louisiana Airport System Plan.

    DOT National Transportation Integrated Search

    1992-10-01

    This report is a non-technical summary of the update to the Louisiana Airport System Plan. The system plan identifies the location, service level, and role of the 81 airports included in the plan and the costs to develop individual airports and the a...

  4. Airport Network Flow Simulator

    DOT National Transportation Integrated Search

    1978-10-01

    The Airport Network Flow Simulator is a FORTRAN IV simulation of the flow of air traffic in the nation's 600 commercial airports. It calculates for any group of selected airports: (a) the landing and take-off (Type A) delays; and (b) the gate departu...

  5. Airport Choice in Sao Paulo Metropolitan Area: An Application of the Conditional Logit Model

    NASA Technical Reports Server (NTRS)

    Moreno, Marcelo Baena; Muller, Carlos

    2003-01-01

    Using the conditional LOGIT model, this paper addresses the airport choice in the Sao Paulo Metropolitan Area. In this region, Guarulhos International Airport (GRU) and Congonhas Airport (CGH) compete for passengers flying to several domestic destinations. The airport choice is believed to be a result of the tradeoff passengers perform considering airport access characteristics, airline level of service characteristics and passenger experience with the analyzed airports. It was found that access time to the airports better explain the airport choice than access distance, whereas direct flight frequencies gives better explanation to the airport choice than the indirect (connections and stops) and total (direct plus indirect) flight frequencies. Out of 15 tested variables, passenger experience with the analyzed airports was the variable that best explained the airport choice in the region. Model specifications considering 1, 2 or 3 variables were tested. The model specification most adjusted to the observed data considered access time, direct flight frequencies in the travel period (morning or afternoon peak) and passenger experience with the analyzed airports. The influence of these variables was therefore analyzed across market segments according to departure airport and flight duration criteria. The choice of GRU (located neighboring Sao Paulo city) is not well explained by the rationality of access time economy and the increase of the supply of direct flight frequencies, while the choice of CGH (located inside Sao Paulo city) is. Access time was found to be more important to passengers flying shorter distances while direct flight frequencies in the travel period were more significant to those flying longer distances. Keywords: Airport choice, Multiple airport region, Conditional LOGIT model, Access time, Flight frequencies, Passenger experience with the analyzed airports, Transportation planning

  6. Pavement smoothness indices : research brief.

    DOT National Transportation Integrated Search

    1998-08-01

    Many in the asphalt industry believe that initial pavement smoothness directly relates to : pavement life. Public perception of smoothness is also important. Oregon is interested in : determining the appropriate method of measurement to quantify smoo...

  7. Evaluation of pavement marking performance.

    DOT National Transportation Integrated Search

    2008-06-01

    The objective of the investigation was to evaluate the useful life of pavement markings. The Manual on Uniform Traffic Control Devices (MUTCD) provides general guidelines for the application and installation of pavement markings. However, performance...

  8. Training development for pavement preservation.

    DOT National Transportation Integrated Search

    2013-05-01

    This research project strives to help the Iowa Department of Transportation (DOT) fully achieve the full benefits of pavement : preservation through training on proper selection, design, and application of pavement preservation treatments. In some ca...

  9. Flexible pavement rehabilitation using pulverization.

    DOT National Transportation Integrated Search

    2008-06-01

    Pulverization is a roadway rehabilitation strategy that involves in-place recycling of the entire existing flexible pavement layer and some of the existing granular base layer (Figure 1). Pavement pulverization provides an alternative to conventional...

  10. Alternative pavements for snowmobile crossings.

    DOT National Transportation Integrated Search

    2009-09-01

    Excessive highway pavement wear from snowmobile traffic is a maintenance problem for the New Hampshire Department of : Transportation. The snowmobiles and trail grooming equipment scar and erode the pavement surfaces, eventually creating wide ruts ac...

  11. Evaluation of composite pavement unbonded overlays : phase III.

    DOT National Transportation Integrated Search

    2007-08-01

    In recent years, thin whitetopping has evolved as a viable rehabilitation technique for deteriorated asphalt cement concrete (ACC) pavements. Numerous projects have been constructed and tested, allowing researchers to identify the important elements ...

  12. 77 FR 51948 - Airport Improvement Program (AIP): Policy Regarding Access to Airports From Residential Property...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-08-28

    ...-0754] Airport Improvement Program (AIP): Policy Regarding Access to Airports From Residential Property... Airports From Residential Property that was published in the Federal Register on July 30, 2012. The FAA is... policy, based on Federal law, concerning through-the- fence access to a federally obligated airport from...

  13. 14 CFR 141.38 - Airports.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 14 Aeronautics and Space 3 2011-01-01 2011-01-01 false Airports. 141.38 Section 141.38 Aeronautics... CERTIFICATED AGENCIES PILOT SCHOOLS Personnel, Aircraft, and Facilities Requirements § 141.38 Airports. (a) An... has continuous use of each airport at which training flights originate. (b) Each airport used for...

  14. 14 CFR 141.38 - Airports.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 14 Aeronautics and Space 3 2013-01-01 2013-01-01 false Airports. 141.38 Section 141.38 Aeronautics... CERTIFICATED AGENCIES PILOT SCHOOLS Personnel, Aircraft, and Facilities Requirements § 141.38 Airports. (a) An... has continuous use of each airport at which training flights originate. (b) Each airport used for...

  15. 14 CFR 141.38 - Airports.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 14 Aeronautics and Space 3 2014-01-01 2014-01-01 false Airports. 141.38 Section 141.38 Aeronautics... CERTIFICATED AGENCIES PILOT SCHOOLS Personnel, Aircraft, and Facilities Requirements § 141.38 Airports. (a) An... has continuous use of each airport at which training flights originate. (b) Each airport used for...

  16. 14 CFR 141.38 - Airports.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 14 Aeronautics and Space 3 2012-01-01 2012-01-01 false Airports. 141.38 Section 141.38 Aeronautics... CERTIFICATED AGENCIES PILOT SCHOOLS Personnel, Aircraft, and Facilities Requirements § 141.38 Airports. (a) An... has continuous use of each airport at which training flights originate. (b) Each airport used for...

  17. Development of reliable pavement models.

    DOT National Transportation Integrated Search

    2011-05-01

    The current report proposes a framework for estimating the reliability of a given pavement structure as analyzed by : the Mechanistic-Empirical Pavement Design Guide (MEPDG). The methodology proposes using a previously fit : response surface, in plac...

  18. Finite element simulation of structural performance on flexible pavements with stabilized base/treated subbase materials under accelerated loading : tech summary.

    DOT National Transportation Integrated Search

    2011-12-01

    Accelerated pavement testing (APT) has been increasingly used by state highway agencies in recent years for evaluating pavement : design and performance through applying a simulative heavy vehicular load to the pavement section under controlled fi el...

  19. Development, design, and flight test evaluation of a continuous descent approach procedure for nighttime operation at Louisville International Airport.

    DOT National Transportation Integrated Search

    2006-01-09

    The design and flight test of a Continuous Descent Approach (CDA) : procedure for regular nighttime operation at Louisville : International Airport are described in this report. Results of : the analyses of aircraft and FMS performance indicate that ...

  20. Highway concrete pavement technology development and testing. Volume I, Field evaluation of strategic highway research program (SHRP) C-202 test sites (alkali-silica reactions (ASR))

    DOT National Transportation Integrated Search

    2006-08-01

    This study consists of continued field evaluations of treatments to four pavements suffering from distress due to alkali-silica reaction (ASR). One set of treatments was evaluated on existing pavements in Delaware, California, and Nevada that already...

  1. Improved image processing of road pavement defect by infrared thermography

    NASA Astrophysics Data System (ADS)

    Sim, Jun-Gi

    2018-03-01

    This paper intends to achieve improved image processing for the clear identification of defects in damaged road pavement structure using infrared thermography non-destructive testing (NDT). To that goal, 4 types of pavement specimen including internal defects were fabricated to exploit the results obtained by heating the specimens by natural light. The results showed that defects located down to a depth of 3 cm could be detected by infrared thermography NDT using the improved image processing method.

  2. Investigation of pavement permeability : Old Bridge Road.

    DOT National Transportation Integrated Search

    2001-01-01

    Several instances of wet pavement and pavement icing on Old Bridge Road were reported to VDOT's Lake Ridge Area Headquarters when no new precipitation had fallen. The pavement structure appears to hold water. This water seeps to the surface at a numb...

  3. Asphalt in Pavement Maintenance.

    ERIC Educational Resources Information Center

    Asphalt Inst., College Park, MD.

    Maintenance methods that can be used equally well in all regions of the country have been developed for the use of asphalt in pavement maintenance. Specific information covering methods, equipment and terminology that applies to the use of asphalt in the maintenance of all types of pavement structures, including shoulders, is provided. In many…

  4. Assessment of the Uretek process on continuously reinforced concrete pavement, jointed concrete pavement, and bridge approach slabs : technical assistance report.

    DOT National Transportation Integrated Search

    2004-12-01

    This study evaluates the rehabilitation method utilizing the injection of Uretek (polyurethane) into the pavement structures on continuously reinforced concrete pavement (CRCP), jointed concrete pavement (JCP), and bridge approach slabs. The polyuret...

  5. Office of Inspector General Audit Report: Accountability and Use of Airport Revenues Queen City Municipal Airport

    DOT National Transportation Integrated Search

    1997-01-30

    The objective of the audit was to determine the validity of allegations that the city of Allentown, Pennsylvania (Sponsor), diverted airport revenues. Specifically, airport users alleged the Sponsor (i) sold Queen City Municipal Airport (airport) lan...

  6. Status report on pavement management.

    DOT National Transportation Integrated Search

    1984-01-01

    This report traces the developments in pavement management in the Virginia Department of Highways and Transportation from the initial efforts in the mid-1970s through early 1984. Included are status reports on pavement management for the interstate, ...

  7. Study of Georgia's pavement deterioration/life and potential risks of delayed pavement resurfacing and rehabilitation.

    DOT National Transportation Integrated Search

    2016-08-01

    Georgia has continuously been rated as one of the states with the smoothest pavements in the United States because the Georgia Department of Transportation (GDOT) has established a standardized pavement condition evaluation system (PACES) for consist...

  8. Metropolitan Washington Airports Authority : contracting practices do not always comply with airport lease requirements

    DOT National Transportation Integrated Search

    2002-03-01

    The Metropolitan Washington Airports Act of 1986 provided for the lease of Washington Dulles International Airport (Dulles) and Ronald Reagan Washington National Airport (Reagan National)and the transfer of operating responsibility from the federal g...

  9. Proactive pavement asset management with climate change aspects

    NASA Astrophysics Data System (ADS)

    Zofka, Adam

    2018-05-01

    Pavement Asset Management System is a systematic and objective tool to manage pavement network based on the rational, engineering and economic principles. Once implemented and mature Pavement Asset Management System serves the entire range of users starting with the maintenance engineers and ending with the decision-makers. Such a system is necessary to coordinate agency management strategy including proactive maintenance. Basic inputs in the majority of existing Pavement Asset Management System approaches comprise the actual pavement inventory with associated construction history and condition, traffic information as well as various economical parameters. Some Pavement Management System approaches include also weather aspects which is of particular importance considering ongoing climate changes. This paper presents challenges in implementing the Pavement Asset Management System for those National Road Administrations that manage their pavement assets using more traditional strategies, e.g. worse-first approach. Special considerations are given to weather-related inputs and associated analysis to demonstrate the effects of climate change in a short- and long-term range. Based on the presented examples this paper concludes that National Road Administrations should account for the weather-related factors in their Pavement Management Systems as this has a significant impact on the system outcomes from the safety and economical perspective.

  10. Effect of mineral additives on structure and properties of concrete for pavements

    NASA Astrophysics Data System (ADS)

    Sobol, Khrystyna; Markiv, Taras; Hunyak, Oleksii

    2017-12-01

    Concrete pavements is an attractive alternative to asphalt pavements because of its lower cost and higher durability. Major contribution to sustainable development can be made by partial replacement of cement in concrete pavement with supplementary cementitious materials of different nature and origin. In this paper, the effect of natural zeolite and perlite additives in complex with chemical admixtures on the structure and properties of concrete for pavement was studied. Compressive and flexural strength test was used to study the mechanical behavior of designed concrete under load. Generally, the compressive strength of both control concrete and concrete containing mineral additives levels at the later ages of hardening. The microstructure analysis of concrete with mineral additives of different nature activity showed the formation of additional amount of hydration products such as tobermorite type calcium hydrosilicate which provide self-reinforcement of hardening concrete system.

  11. Evaluation of airport subsurface materials

    DOT National Transportation Integrated Search

    1997-05-01

    Pavement structures located in regions with seasonal changes encounter regular cycles of freezing and thawing. Such environmental factors must be considered so that it can be certain that the pavement can accommodate continuous aircraft loading. 11 s...

  12. Quiet pavement systems in Europe

    DOT National Transportation Integrated Search

    2005-05-01

    Noise pollution is a growing concern in the United States. A major contributor of highway noise is at the tire-pavement interface, which means that quieter pavements could lead to reductions in traffic-generated noise. The Federal Highway Administrat...

  13. Airport Surface Movement Technologies: Atlanta Demonstrations Overview

    NASA Technical Reports Server (NTRS)

    Jones, Denise R.; Young, Steven D.

    1997-01-01

    A flight demonstration was conducted in August 1997 at the Hartsfield Atlanta (ATL) International Airport as part of low visibility landing and surface operations (LVLASO) research activities. This research was aimed at investigating technology to improve the safety and efficiency of aircraft movements on the surface during the operational phases of roll-out, turnoff, and taxi in any weather condition down to a runway visual range of 300 feet. The system tested at ATL was composed of airborne and ground-based components that were integrated to provide both the flight crew and controllers with supplemental information to enable safe, expedient surface operations. Experimental displays were installed on a Boeing 757-200 research aircraft in both headup and head-down formats. On the ground, an integrated system maintained surveillance of the airport surface and a controller interface provided routing and control instructions. While at ATL, the research aircraft performed a series of flight and taxi operations to show the validity of the operational concept at a major airport facility, to validate simulation findings, and to assess each of the individual technologies performance in an airport environment. The concept was demonstrated to over 100 visitors from the Federal Aviation Administration (FAA) and the aviation community. This paper gives an overview of the LVLASO system and ATL test activities.

  14. C-Band Airport Surface Communications System Standards Development. Phase II Final Report. Volume 2: Test Bed Performance Evaluation and Final AeroMACS Recommendations

    NASA Technical Reports Server (NTRS)

    Hall, Edward; Magner, James

    2011-01-01

    This report is provided as part of ITT s NASA Glenn Research Center Aerospace Communication Systems Technical Support (ACSTS) contract NNC05CA85C, Task 7: New ATM Requirements-Future Communications, C-Band and L-Band Communications Standard Development and was based on direction provided by FAA project-level agreements for New ATM Requirements-Future Communications. Task 7 included two subtasks. Subtask 7-1 addressed C-band (5091- to 5150-MHz) airport surface data communications standards development, systems engineering, test bed and prototype development, and tests and demonstrations to establish operational capability for the Aeronautical Mobile Airport Communications System (AeroMACS). Subtask 7-2 focused on systems engineering and development support of the L-band digital aeronautical communications system (L-DACS). Subtask 7-1 consisted of two phases. Phase I included development of AeroMACS concepts of use, requirements, architecture, and initial high-level safety risk assessment. Phase II builds on Phase I results and is presented in two volumes. Volume I is devoted to concepts of use, system requirements, and architecture, including AeroMACS design considerations. Volume II (this document) describes an AeroMACS prototype evaluation and presents final AeroMACS recommendations. This report also describes airport categorization and channelization methodologies. The purposes of the airport categorization task were (1) to facilitate initial AeroMACS architecture designs and enable budgetary projections by creating a set of airport categories based on common airport characteristics and design objectives, and (2) to offer high-level guidance to potential AeroMACS technology and policy development sponsors and service providers. A channelization plan methodology was developed because a common global methodology is needed to assure seamless interoperability among diverse AeroMACS services potentially supplied by multiple service providers.

  15. Statistical classification of road pavements using near field vehicle rolling noise measurements.

    PubMed

    Paulo, Joel Preto; Coelho, J L Bento; Figueiredo, Mário A T

    2010-10-01

    Low noise surfaces have been increasingly considered as a viable and cost-effective alternative to acoustical barriers. However, road planners and administrators frequently lack information on the correlation between the type of road surface and the resulting noise emission profile. To address this problem, a method to identify and classify different types of road pavements was developed, whereby near field road noise is analyzed using statistical learning methods. The vehicle rolling sound signal near the tires and close to the road surface was acquired by two microphones in a special arrangement which implements the Close-Proximity method. A set of features, characterizing the properties of the road pavement, was extracted from the corresponding sound profiles. A feature selection method was used to automatically select those that are most relevant in predicting the type of pavement, while reducing the computational cost. A set of different types of road pavement segments were tested and the performance of the classifier was evaluated. Results of pavement classification performed during a road journey are presented on a map, together with geographical data. This procedure leads to a considerable improvement in the quality of road pavement noise data, thereby increasing the accuracy of road traffic noise prediction models.

  16. Active solution of homography for pavement crack recovery with four laser lines.

    PubMed

    Xu, Guan; Chen, Fang; Wu, Guangwei; Li, Xiaotao

    2018-05-08

    An active solution method of the homography, which is derived from four laser lines, is proposed to recover the pavement cracks captured by the camera to the real-dimension cracks in the pavement plane. The measurement system, including a camera and four laser projectors, captures the projection laser points on the 2D reference in different positions. The projection laser points are reconstructed in the camera coordinate system. Then, the laser lines are initialized and optimized by the projection laser points. Moreover, the plane-indicated Plücker matrices of the optimized laser lines are employed to model the laser projection points of the laser lines on the pavement. The image-pavement homography is actively determined by the solutions of the perpendicular feet of the projection laser points. The pavement cracks are recovered by the active solution of homography in the experiments. The recovery accuracy of the active solution method is verified by the 2D dimension-known reference. The test case with the measurement distance of 700 mm and the relative angle of 8° achieves the smallest recovery error of 0.78 mm in the experimental investigations, which indicates the application potentials in the vision-based pavement inspection.

  17. Monitoring of Airport Revenues at Arlington Municipal Airport; Federal Aviation Administration Northwest Mountain Region

    DOT National Transportation Integrated Search

    1997-01-15

    The objectives of our audit were to determine whether Federal Aviation : Administration (FAA) monitoring of Arlington Municipal Airport (Airport) was : adequate to ensure (i) a fee and rental structure was maintained which made the : Airport as self-...

  18. Guidelines for rehabilitating flexible pavements.

    DOT National Transportation Integrated Search

    1986-01-01

    The guidelines presented in this report are intended as an aid to the engineer in selecting the most appropriate type of pavement rehabilitation from those that are available. The basic types of distress in pavement surfaces and their causes are desc...

  19. Estimation of Asphalt Pavement Life

    DOT National Transportation Integrated Search

    2002-01-01

    The milling of asphalt concrete (AC) pavement surface refers to the mechanical removal of a part of the pavement surface. The Kansas Department of Transportation (KDOT) and the Kansas Turnpike Authority (KTA) routinely mill the surfaces of some AC pa...

  20. Assessment of stripped asphalt pavement.

    DOT National Transportation Integrated Search

    1989-01-01

    Many miles of stripped pavement need to be restored to a serviceable condition, but there is no accepted procedure to determine whether the pavement should remain in place or be removed during the rehabilitation process. This report describes the att...

  1. Evaluation of Pavement Safety Performance

    DOT National Transportation Integrated Search

    2015-02-01

    The intent of this study was to isolate the effects of various low-cost pavement treatments on roadway safety. This was a retrospective study of pavement safety performance, looking back at crash data before and after treatments were installed. Both ...

  2. Aircraft wake vortex takeoff tests at O'Hare International Airport

    DOT National Transportation Integrated Search

    1994-08-01

    Three wake vortex measurement systems (anemometer, acoustic doppler, and laser : doppler) were used to collect wake vortex data from aircraft departing Runway 22L at : Chicago's O'Hare airport for nine months in 1980. The data were analyzed to determ...

  3. Data collected on TPAD implementation projects.

    DOT National Transportation Integrated Search

    2014-11-01

    TPAD testing was conducted by CTR personnel at the following locations during TxDOT Project : 5-6005-01: Statewide Implementation of Total Pavement Acceptance Device (TPAD) (January : 2013 through August 2014): : (1) San Marcos Airport, : (2) IH 10 i...

  4. Development of nondestructive methods for measurement of slab thickness and modulus of rupture in concrete pavements.

    DOT National Transportation Integrated Search

    2005-01-01

    This report describes work to develop non-destructive testing methods for concrete pavements. Two methods, for pavement thickness and in-place strength estimation, respectively, were developed and evaluated. The thickness estimation method is based o...

  5. Evaluation of Procedures for Backcalculation of Airfield Pavement Moduli

    DTIC Science & Technology

    2015-08-01

    to develop pavement design and structural evaluation criteria, procedures, and software to ensure that its airfield pavements can support mission...aircraft. As tire pressures and aircraft weights have increased steadily during this time, the design and evaluation software– Pavement -Transportation...the remaining life for the pavement in terms of remaining pavement life (passes-to-failure) or allowable gross aircraft loads and also to design

  6. Long-Term Pavement Performance Program determination of in-place elastic layer modulus : backcalculation methodology and procedures.

    DOT National Transportation Integrated Search

    2015-12-01

    Deflection data have been measured at periodic intervals with a falling weight deflectometer on all rigid, flexible, semirigid, : and rehabilitated pavement test sections included in the Long-Term Pavement Performance (LTPP) program. A : common use o...

  7. Pervious Pavement System Evaluation-Paper

    EPA Science Inventory

    The use of a pervious pavement can be effective as a low impact development stormwater control. The Urban Watershed Management Branch is evaluating interlocking concrete paver systems as a type of porous pavement. Although the pavers are impermeable, the spaces between the pave...

  8. Performance evaluation of Arizona's LTPP SPS-9 project : strategic study of flexible pavement binder factors.

    DOT National Transportation Integrated Search

    2015-06-01

    As part of the Long Term Pavement Performance (LTPP) Program, the Arizona Department of Transportation (ADOT) : constructed eight Specific Pavement Studies 9 (SPS9) test sections on Interstate 10 near Phoenix (04B900). SPS9A : 04B900 is an over...

  9. An integrated pavement data management and feedback system (PAMS) : evaluation of pavement condition rating procedure.

    DOT National Transportation Integrated Search

    1984-08-01

    This report describes an evaluation of a method for use in the Highway Needs Study pavement condition rating. The methods by which the Department generates and manages pavement condition data in the overall process of providing a network of highways ...

  10. How to reduce tire-pavement noise : better practices for constructing and texturing concrete pavement surfaces.

    DOT National Transportation Integrated Search

    2012-08-01

    Concrete pavements can be designed and constructed to be as quiet as any other conventional pavement type in use today. This report provides an overview of how this can be doneand done consistently. In order to construct a quieter concrete pavemen...

  11. Minnesota Local Agency Pavement Marking : Mining Existing Data

    DOT National Transportation Integrated Search

    2017-11-01

    Pavement marking is important for safety. Maximizing pavement marking performance in terms of increased retroreflectivity, within limited budget constraints, allows agencies to make better decisions toward providing more effective pavement marking pe...

  12. Intelligent building system for airport

    DOE Office of Scientific and Technical Information (OSTI.GOV)

    Ancevic, M.

    1997-11-01

    The Munich airport uses a state-of-the-art intelligent building management system to control systems such as HVAC, runway lights, baggage handling, etc. Planning the new Munich II international airport provided a unique opportunity to use the latest state-of-the-art technical systems, while integrating their control through a single intelligent building management system. Opened in 1992, the airport is Germany`s second-largest airport after Frankfurt. The airport is staffed by 16,000 employees and can handle 17 million passengers a year. The sprawling site encompasses more than 120 buildings. The airport`s distributed control system is specifically designed to optimize the complex`s unique range of functions,more » while providing a high degree of comfort, convenience and safety for airport visitors. With the capacity to control 200,000 points, this system controls more than 112,000 points and integrates 13 major subsystems from nine different vendors. It provides convenient, accessible control of everything including the complex`s power plant, HVAC Control, the terminal`s people-moving functions, interior lighting controls, runway lights, baggage forwarding systems, elevators, and boarding bridges. The airport was named 1993 intelligent building of the year by the Intelligent Buildings Institute Foundation. Its building management system is a striking example of the degree to which a building complex`s functions can be integrated for greater operational control and efficiency.« less

  13. The effects of varying the tire cap ply, sidewall filler height and pavement surface texture on tire/pavement noise generation

    DOT National Transportation Integrated Search

    2003-02-01

    In order to better understand the effect of tire carcass construction and pavement texture on tire/pavement noise generation, a measurement program was conducted on a group of four automobile tires on three pavement textures. The tires included all c...

  14. Comparative field permeability measurement of permeable pavements using ASTM C1701 and NCAT permeameter methods.

    PubMed

    Li, Hui; Kayhanian, Masoud; Harvey, John T

    2013-03-30

    Fully permeable pavement is gradually gaining support as an alternative best management practice (BMP) for stormwater runoff management. As the use of these pavements increases, a definitive test method is needed to measure hydraulic performance and to evaluate clogging, both for performance studies and for assessment of permeability for construction quality assurance and maintenance needs assessment. Two of the most commonly used permeability measurement tests for porous asphalt and pervious concrete are the National Center for Asphalt Technology (NCAT) permeameter and ASTM C1701, respectively. This study was undertaken to compare measured values for both methods in the field on a variety of permeable pavements used in current practice. The field measurements were performed using six experimental section designs with different permeable pavement surface types including pervious concrete, porous asphalt and permeable interlocking concrete pavers. Multiple measurements were performed at five locations on each pavement test section. The results showed that: (i) silicone gel is a superior sealing material to prevent water leakage compared with conventional plumbing putty; (ii) both methods (NCAT and ASTM) can effectively be used to measure the permeability of all pavement types and the surface material type will not impact the measurement precision; (iii) the permeability values measured with the ASTM method were 50-90% (75% on average) lower than those measured with the NCAT method; (iv) the larger permeameter cylinder diameter used in the ASTM method improved the reliability and reduced the variability of the measured permeability. Copyright © 2013 Elsevier Ltd. All rights reserved.

  15. Airport activity and noise trends

    DOT National Transportation Integrated Search

    1993-10-01

    This report is published by the Metropolitan Transportation Commission : (MTC) to provide information concerning local Bay Area airport activity and : airport noise trends. The airport activity data are obtained from published : airline schedules and...

  16. Statewide test of construction quality index for pavement software : final report, October 2008.

    DOT National Transportation Integrated Search

    2008-10-01

    All Florida Department of Transportation (FDOT) pavement projects are accepted in accordance with : one or more construction specifications. The purposes of these specifications are to provide guidance : and establish minimum requirements that enable...

  17. Airport Landside. Volume I. Planning Guide.

    DOT National Transportation Integrated Search

    1982-01-01

    This volume describes a methodology for performing airport landside planning by applying the Airport Landside Simulation Model (ALSIM) developed by TSC. For this analysis, the airport landside is defined as extending from the airport boundary to the ...

  18. 76 FR 69321 - Intent To Rule On Request To Release Airport Property at the Malden Regional Airport and...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-11-08

    ... Airport Property at the Malden Regional Airport and Industrial Park (MAW), Malden, MO AGENCY: Federal... comment on the release of land at the Malden Regional Airport & Industrial Park (MAW), Malden, Missouri... address: Lynn D. Martin, Airports Compliance Specialist, Federal Aviation Administration, Airports...

  19. Approved Airport Equipment

    DOT National Transportation Integrated Search

    1997-06-06

    This advisory circular (AC) administratively cancels AC 150/5345-1U, Approved : Airport Equipment dated February 20, 1989, and directs replacement of any : reference to AC 150/5345-1 with AC 150/5345-53, Airport Lighting Equipment : Certification Pro...

  20. Long term pavement performance computed parameter : moisture content

    DOT National Transportation Integrated Search

    2008-01-01

    A study was conducted to compute in situ soil parameters based on time domain reflectometry (TDR) traces obtained from Long Term Pavement Performance (LTPP) test sections instrumented for the seasonal monitoring program (SMP). Ten TDR sensors were in...

  1. Performance evaluation of Arizona's LTPP SPS-2 project : strategic study of structural factors for rigid pavements.

    DOT National Transportation Integrated Search

    2015-10-01

    As part of the Long Term Pavement Performance (LTPP) Program, Arizona Department of Transportation : (ADOT) constructed 21 Specific Pavement Studies 2 (SPS-2) test sections on Interstate 10 near Buckeye, : Arizona, to study a variety of structural se...

  2. Best practices for architectural pavement treatments : final report.

    DOT National Transportation Integrated Search

    2010-03-01

    Architectural Pavement Treatments are special treatments applied to pavements to enhance the aesthetic : character of the pavement and the surrounding environs in which they are applied. They achieve this objective : by imparting special colors and/o...

  3. Geotextiles in Flexible Pavement Construction

    ERIC Educational Resources Information Center

    Alungbe, Gabriel D.

    2004-01-01

    People everywhere in the developed world regularly drive on paved roads. Learning about the construction techniques and materials used in paving benefits technology and construction students. This article discusses the use of geosynthetic textiles in pavement construction. It presents background on pavements and describes geotextiles and drainage…

  4. Feasibility of reclaimed asphalt pavement as aggregate in portland cement concrete pavement, phase II : field demonstration.

    DOT National Transportation Integrated Search

    2015-10-01

    This research was focused on evaluating the feasibility of using minimally processed reclaimed asphalt pavement (RAP) as : aggregate replacement in concrete pavements. An initial phase of research demonstrated that concretes with up to 50 percent : o...

  5. Performance evaluation of Arizona's LTPP SPS-5 project : strategic study of rehabilitation of asphalt concrete pavements.

    DOT National Transportation Integrated Search

    2015-06-01

    As part of the Long Term Pavement Performance (LTPP) Program, the Arizona Department of Transportation : (ADOT) constructed 11 Specific Pavement Study5 (SPS5) test sections on Interstate 8 near Casa Grande. The : SPS5 project studied a varie...

  6. Analysis of Cracking in Jointed Plain Concrete Pavements

    DOT National Transportation Integrated Search

    2017-03-01

    This paper investigates the trends of longitudinal and transverse cracking in jointed concrete pavements based on Long-Term Pavement Performance (LTPP) Program Strategic Study of Structural Factors for Rigid Pavements (SPS-2) data. The impacts of sla...

  7. Effectiveness of various public private partnership pavement rehabilitation treatments: A big data informatics survival analysis of pavement service life : final report.

    DOT National Transportation Integrated Search

    2017-09-29

    Past research efforts have used a wide variety of methodological approaches to analyze pavement performance indicators, pavement rehabilitation treatments, and pavement service life. Using big data informatics methods, the intent of this study is to ...

  8. Georgia concrete pavement performance and longevity.

    DOT National Transportation Integrated Search

    2012-02-01

    The Georgia Department of Transportation (GDOT) has effectively utilized its pavement management system (PMS) to make informed, data-driven pavement maintenance decisions, including project selection, project prioritization, and funding allocation. C...

  9. Pavement thickness design for local roads in Iowa.

    DOT National Transportation Integrated Search

    2010-02-01

    Three pavement design software packages were compared with regards to how they were different in determining design input parameters and their influences on the pavement thickness. StreetPave designs the concrete pavement thickness based on the PCA m...

  10. Performance evaluation of Arizona's LTPP SPS-9 Project : strategic study of flexible pavement mix design factors.

    DOT National Transportation Integrated Search

    2016-01-01

    As part of the Long Term Pavement Performance (LTPP) Program, the Arizona Department of Transportation (ADOT) constructed five Specific Pavement Studies 9 (SPS9) test sections on U.S. Route 93 near Kingman. This project, SPS9B, studied the effe...

  11. Airport Ground Access Planning Guide

    DOT National Transportation Integrated Search

    1980-07-01

    Airport access has been identified by some airport authorities as a potential threat to the growth of aviation. In order to help airport planners and local authorities define the critical elements of an access problem and identify improvement project...

  12. Airport Capacity Enhancement Plan.

    DTIC Science & Technology

    1986-01-01

    capacity and efficiency of airports without sacrificing safety and enviromental concerns. PA L. 0t- ~I|| TABLE OF CONTENTS SECTION Page EXECUTIVE...environmental, and socio - political factors. These constraints include the following: * The construction of new airports and the expansion of the...inter-airport conflicts . In New he York, for example, an MLS installation at LaGuardia ns could reduce some arrival route lengths significantly, ’.@rts

  13. Pavement sound absorption measurements in the U.S.

    DOT National Transportation Integrated Search

    2012-08-19

    In the U.S., the topic of pavement sound absorption in regard to tire-pavement noise has shown increased interest and research over the last several years. Four types of pavement sound absorption measurements with various applications are discussed: ...

  14. NASA Public Affairs and NUANCE Lab News Conference at Reno-Stead Airport.

    NASA Image and Video Library

    2016-10-19

    News Conference following the test of Unmanned Aircraft Systems Traffic Management (UTM) technical capability Level 2 (TCL2) at Reno-Stead Airport, Nevada. Maril Mora, President / CEO of the Reno -Tahoe Airport Authority welcomes NASA and Partners.

  15. 49 CFR 27.71 - Airport facilities.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 49 Transportation 1 2010-10-01 2010-10-01 false Airport facilities. 27.71 Section 27.71... Administration Programs: Airports, Railroads, and Highways § 27.71 Airport facilities. (a) This section applies... financial assistance at a commercial service airport, including parking and ground transportation facilities...

  16. 49 CFR 27.71 - Airport facilities.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 49 Transportation 1 2012-10-01 2012-10-01 false Airport facilities. 27.71 Section 27.71... Administration Programs: Airports, Railroads, and Highways § 27.71 Airport facilities. (a) This section applies... financial assistance at a commercial service airport, including parking and ground transportation facilities...

  17. 49 CFR 27.71 - Airport facilities.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 49 Transportation 1 2013-10-01 2013-10-01 false Airport facilities. 27.71 Section 27.71... Administration Programs: Airports, Railroads, and Highways § 27.71 Airport facilities. (a) This section applies... financial assistance at a commercial service airport, including parking and ground transportation facilities...

  18. Pavement Structural Evaluation at the Network Level: Final Report

    DOT National Transportation Integrated Search

    2016-09-01

    As State transportation departments consider structural adequacy as part of their routine pavement management system (PMS) activities by incorporating deflection testing, it is important to advance their practices from measuring deflection using fall...

  19. Develop guidelines for pavement preservation treatments and for building a pavement preservation program platform for Alaska.

    DOT National Transportation Integrated Search

    2012-11-01

    This reports summarizes the project findings including the following: : An evaluation of the current pavement preservation program used in Alaska and a roadmap to grow the program : A summary of the best practices in terms of pavement preserv...

  20. U.S. Airport Greenhouse Gas Emissions Inventories: State of the Practice and Recommendations for Airports.

    DOT National Transportation Integrated Search

    2016-03-01

    This document presents highlights from five research reports on airport greenhouse gas (GHG) emissions inventories. It presents the most salient findings for policy makers and U.S. airports seeking to better understand and inventory airport GHG emiss...

  1. A design guide for subdivision pavements in Virginia.

    DOT National Transportation Integrated Search

    1973-01-01

    The design method for secondary roads and that for subdivision roads are based on AASHO Road Test Results and Virginia's design experience. For flexible pavements, the methods are divided into two parts: (1) the evaluation of the soil support value o...

  2. Sealants and cold regions pavement seals : a review

    DOT National Transportation Integrated Search

    1995-05-01

    A pavement joint seal prevents the passage of liquids into the pavement base and the intrusion of solids into the joint. The primary mechanical requirements of a pavement seal are that it respond elastically or viscoelastically to any movement of the...

  3. Pervious concrete mix optimization for sustainable pavement solution

    NASA Astrophysics Data System (ADS)

    Barišić, Ivana; Galić, Mario; Netinger Grubeša, Ivanka

    2017-10-01

    In order to fulfill requirements of sustainable road construction, new materials for pavement construction are investigated with the main goal to preserve natural resources and achieve energy savings. One of such sustainable pavement material is pervious concrete as a new solution for low volume pavements. To accommodate required strength and porosity as the measure of appropriate drainage capability, four mixtures of pervious concrete are investigated and results of laboratory tests of compressive and flexural strength and porosity are presented. For defining the optimal pervious concrete mixture in a view of aggregate and financial savings, optimization model is utilized and optimal mixtures defined according to required strength and porosity characteristics. Results of laboratory research showed that comparing single-sized aggregate pervious concrete mixtures, coarse aggregate mixture result in increased porosity but reduced strengths. The optimal share of the coarse aggregate turn to be 40.21%, the share of fine aggregate is 49.79% for achieving required compressive strength of 25 MPa, flexural strength of 4.31 MPa and porosity of 21.66%.

  4. Analysis of the Demand for Airport Bus Services at Washington National and Dulles International Airports

    DOT National Transportation Integrated Search

    1984-05-01

    This report presents the findings and recommendations from a study of the demand for airport bus services at Washington National and Dulles International Airports. The purpose of the study was to provide FAA's Metropolitan Washington Airports with a ...

  5. Quantifying Evaporation in a Permeable Pavement System ...

    EPA Pesticide Factsheets

    Studies quantifying evaporation from permeable pavement systems are limited to a few laboratory studies and one field application. This research quantifies evaporation for a larger-scale field application by measuring the water balance from lined permeable pavement sections. The U.S. Environmental Protection Agency (USEPA) constructed a 0.4-ha parking lot in Edison, NJ, that incorporated three different permeable pavement types in the parking lanes – permeable interlocking concrete pavers (PICP), pervious concrete (PC), and porous asphalt (PA). An impermeable liner installed 0.4 m below the driving surface in four 11.6-m by 4.74-m sections per each pavement type captures all infiltrating water and routes it to collection tanks that can contain events up to 38 mm. Each section has a design impervious area to permeable pavement area ratio of 0.66:1. Pressure transducers installed in the underdrain collection tanks measured water level for 24 months. Level was converted to volume using depth-to-volume ratios for individual collection tanks. Using a water balance approach, the measured infiltrate volume was compared to rainfall volume on an event-basis to determine the rainfall retained in the pavement strata and underlying aggregate. Evaporation since the previous event created additional storage in the pavement and aggregate layers. Events were divided into three groups based on antecedent dry period (ADP) and three, four-month categories of potential e

  6. Improving Rutting Resistance of Pavement Structures Using Geosynthetics: An Overview

    PubMed Central

    Karim, Mohamed Rehan; Khodaii, Ali; Almasi, Mohammad Hadi

    2014-01-01

    A pavement structure consists of several layers for the primary purpose of transmitting and distributing traffic loads to the subgrade. Rutting is one form of pavement distresses that may influence the performance of road pavements. Geosynthetics is one type of synthetic materials utilized for improving the performance of pavements against rutting. Various studies have been conducted on using different geosynthetic materials in pavement structures by different researchers. One of the practices is a reinforcing material in asphalt pavements. This paper intends to present and discuss the discoveries from some of the studies on utilizing geosynthetics in flexible pavements as reinforcement against permanent deformation (rutting). PMID:24526919

  7. Improving rutting resistance of pavement structures using geosynthetics: an overview.

    PubMed

    Mirzapour Mounes, Sina; Karim, Mohamed Rehan; Khodaii, Ali; Almasi, Mohammad Hadi

    2014-01-01

    A pavement structure consists of several layers for the primary purpose of transmitting and distributing traffic loads to the subgrade. Rutting is one form of pavement distresses that may influence the performance of road pavements. Geosynthetics is one type of synthetic materials utilized for improving the performance of pavements against rutting. Various studies have been conducted on using different geosynthetic materials in pavement structures by different researchers. One of the practices is a reinforcing material in asphalt pavements. This paper intends to present and discuss the discoveries from some of the studies on utilizing geosynthetics in flexible pavements as reinforcement against permanent deformation (rutting).

  8. Finite element simulation of structural performance on flexible pavements with stabilized base/treated sub-base materials under accelerated loading : research project capsule.

    DOT National Transportation Integrated Search

    2008-12-01

    PROBLEM: The full-scale accelerated pavement testing (APT) provides a unique tool for pavement : engineers to directly collect pavement performance and failure data under heavy : wheel loading. However, running a full-scale APT experiment is very exp...

  9. Sustainable Mitigation of Stormwater Runoff Through Fully Permeable Pavement

    DOT National Transportation Integrated Search

    2018-03-01

    This report presents the implementation of new design method developed using mechanistic-empirical design approach by University of California Pavement Research Center (UCPRC) through building two test sections at California State University Long Bea...

  10. Future design of perpetual pavements for New Mexico.

    DOT National Transportation Integrated Search

    2009-12-29

    This study provides guidance for future designs of perpetual pavements in New Mexico. The perpetual pavement in this study refers to only hot mix asphalt (HMA) pavement sections designed for a useful life of 50 years or more without having major dist...

  11. Field investigation of high performance pavements in Virginia.

    DOT National Transportation Integrated Search

    2005-01-01

    This study evaluated 18 pavement sections located in high-traffic highways in Virginia to find a premium pavement design with a life span of 40 years or more using current and past field experience. The selected pavement sections were thought to perf...

  12. 75 FR 57829 - Airport Improvement Program (AIP): Policy Regarding Access to Airports From Residential Property

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-09-22

    ... DEPARTMENT OF TRANSPORTATION Federal Aviation Administration [Docket No. FAA-2010-0831] Airport Improvement Program (AIP): Policy Regarding Access to Airports From Residential Property AGENCY: Federal... inadvertent omission in the Privacy paragraph in the Notice of Proposed Policy Regarding Access to Airports...

  13. Pavement Remaining Service Interval [Tech Brief

    DOT National Transportation Integrated Search

    2013-05-01

    This document is a technical summary of the Federal Highway Administration reports, "Reformulated Pavement Remaining Service Life Framework" (FHWA-HRT-13-038) and "Pavement Remaining Service Interval Implementation Guidelines" (FHWA-HRT-13-050). At t...

  14. Assessment of in-situ compaction degree of HMA pavement surface layers using GPR and novel dielectric properties-based algorithms

    NASA Astrophysics Data System (ADS)

    Georgiou, Panos; Loizos, Fokion

    2015-04-01

    Field compaction of asphalt pavements is ultimately conducted to achieve layer(s) with suitable mechanical stability. However, the achieved degree of compaction has a significant influence on the performance of asphalt pavements. Providing all desirable mixture design characteristics without adequate compaction could lead to premature permanent deformation, excessive aging, and moisture damage; these distresses reduce the useful life of asphalt pavements. Hence, proper construction of an asphalt pavement is necessary to develop a long lasting roadway that will help minimize future maintenance. This goal is achieved by verifying and confirming that design specifications, in this case density specifications are met through the use of Quality Assurance (QA) practices. With respect to in-situ compaction degree of hot mix asphalt (HMA) pavement surface layers, nearly all agencies specify either cored samples or nuclear/ non nuclear density gauges to provide density measurement of the constructed pavement. Typically, a small number of spot tests (with either cores or nuclear gauges) are run and a judgment about the density level of the entire roadway is made based on the results of this spot testing. Unfortunately, density measurement from a small number of spots may not be representative of the density of the pavement mat. Hence, full coverage evaluation of compaction quality of the pavement mat is needed. The Ground Penetrating Radar (GPR), as a Non Destructive Testing (NDT) technique, is an example of a non-intrusive technique that favors over the methods mentioned above for assessing compaction quality of asphalt pavements, since it allows measurement of all mat areas. Further, research studies in recent years have shown promising results with respect to its capability, coupled with the use of novel algorithms based on the dielectric properties of HMA, to predict the in-situ field density. In view of the above, field experimental surveys were conducted to assess the

  15. Analysis of Helicopter Mishaps at Heliports, Airports and Unimproved Sites

    DTIC Science & Technology

    1991-01-01

    Distance ___________ NM A Bearno a_________ ,.~ 400’n 4 Airport Category 5 Airport Certificatton (FAR M39 6 Emergency Plan Tested 7 Months Since...Emergency Plan Tested 1 0 Commerciai service ,0C Ful certrt,catio, 0 ye- 2 0 Reliever 2 [C Limireo certificatior I C 3 0 Ge’e-rai aviation None, Go to block...Aeriai application 8 1Public use 3, instructional (Incluaing air carrer training) 6 -IAerial observation 9 1Ferry A Soecit First PMot Information 87

  16. 14 CFR 152.103 - Sponsors: Airport development.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 14 Aeronautics and Space 3 2014-01-01 2014-01-01 false Sponsors: Airport development. 152.103... (CONTINUED) AIRPORTS AIRPORT AID PROGRAM Eligibility Requirements and Application Procedures § 152.103 Sponsors: Airport development. (a) To be eligible to apply for a project for airport development with...

  17. 14 CFR 152.103 - Sponsors: Airport development.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 14 Aeronautics and Space 3 2013-01-01 2013-01-01 false Sponsors: Airport development. 152.103... (CONTINUED) AIRPORTS AIRPORT AID PROGRAM Eligibility Requirements and Application Procedures § 152.103 Sponsors: Airport development. (a) To be eligible to apply for a project for airport development with...

  18. 14 CFR 152.103 - Sponsors: Airport development.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 14 Aeronautics and Space 3 2012-01-01 2012-01-01 false Sponsors: Airport development. 152.103... (CONTINUED) AIRPORTS AIRPORT AID PROGRAM Eligibility Requirements and Application Procedures § 152.103 Sponsors: Airport development. (a) To be eligible to apply for a project for airport development with...

  19. Operating the Portable Seismic Pavement Analyzer

    DTIC Science & Technology

    2006-12-01

    8 Thickness versus modulus...amplitude versus time waveforms....................................................................... 9 Figure 10. A thickness versus Young’s modulus plot...modulus of portland cement concrete (PCC) and asphalt concrete (AC) pavements. Additional strength parameters necessary for structural pavement

  20. Evaluation of pavement surface friction treatments.

    DOT National Transportation Integrated Search

    2011-12-01

    The implementation of a pavement preservation program involves a learning curve with not only a determination to succeed, but : also the courage to fail. Also, successful implementation of pavement preservation program requires knowledge of the perfo...

  1. Internally cured concrete for pavement and bridge deck applications.

    DOT National Transportation Integrated Search

    2015-07-01

    A laboratory and field testing program was conducted to evaluate the performance and usability of internally : cured concrete (ICC) using lightweight aggregates for bridge decks and concrete pavement slabs under Florida : conditions. The laboratory t...

  2. The use of reflective and permeable pavements as a potential practice for heat island mitigation and stormwater management

    NASA Astrophysics Data System (ADS)

    Li, H.; Harvey, J. T.; Holland, T. J.; Kayhanian, M.

    2013-03-01

    To help address the built environmental issues of both heat island and stormwater runoff, strategies that make pavements cooler and permeable have been investigated through measurements and modeling of a set of pavement test sections. The investigation included the hydraulic and thermal performance of the pavements. The permeability results showed that permeable interlocking concrete pavers have the highest permeability (or infiltration rate, ˜0.5 cm s-1). The two permeable asphalt pavements showed the lowest permeability, but still had an infiltration rate of ˜0.1 cm s-1, which is adequate to drain rainwater without generating surface runoff during most typical rain events in central California. An increase in albedo can significantly reduce the daytime high surface temperature in summer. Permeable pavements under wet conditions could give lower surface temperatures than impermeable pavements. The cooling effect highly depends on the availability of moisture near the surface layer and the evaporation rate. The peak cooling effect of watering for the test sections was approximately 15-35 °C on the pavement surface temperature in the early afternoon during summer in central California. The evaporative cooling effect on the pavement surface temperature at 4:00 pm on the third day (25 h after watering) was still 2-7 °C lower compared to that on the second day, without considering the higher air temperature on the third day. A separate and related simulation study performed by UCPRC showed that full depth permeable pavements, if designed properly, can carry both light-duty traffic and certain heavy-duty vehicles while retaining the runoff volume captured from an average California storm event. These preliminarily results indicated the technical feasibility of combined reflective and permeable pavements for addressing the built environment issues related to both heat island mitigation and stormwater runoff management.

  3. Hydraulic and environmental behavior of recycled asphalt pavement in highway shoulder applications

    DOT National Transportation Integrated Search

    2017-10-01

    Hydraulic conductivity of seven recycled asphalt pavement materials (RAPs) was evaluated through a series of constant-head tests, while their leaching potential was determined through batch leach tests and column leach tests. The contaminant transpor...

  4. Evaluation of concrete inlay for continuously reinforced concrete pavement rehabilitation.

    DOT National Transportation Integrated Search

    2010-06-01

    In 1996, WisDOT constructed a concrete inlay test section on I43 in Manitowoc County. The existing pavement was CRCP constructed in 1978 and was badly deteriorated with punchouts. In the area of the 2777foot test section, the existing paveme...

  5. Airport Careers. Aviation Careers Series. Revised.

    ERIC Educational Resources Information Center

    Zaharevitz, Walter

    This booklet, one in a series on aviation careers, outlines the variety of careers available in airports. The first part of the booklet provides general information about careers at airports, while the main part of the booklet outlines the following nine job categories: airport director, assistant airport director, engineers, support personnel,…

  6. 14 CFR 151.3 - National Airport Plan.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 14 Aeronautics and Space 3 2013-01-01 2013-01-01 false National Airport Plan. 151.3 Section 151.3 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (CONTINUED) AIRPORTS FEDERAL AID TO AIRPORTS General Requirements § 151.3 National Airport Plan. (a) Under the Federal Airport...

  7. 14 CFR 151.3 - National Airport Plan.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 14 Aeronautics and Space 3 2014-01-01 2014-01-01 false National Airport Plan. 151.3 Section 151.3 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (CONTINUED) AIRPORTS FEDERAL AID TO AIRPORTS General Requirements § 151.3 National Airport Plan. (a) Under the Federal Airport...

  8. Hot in-Place Recycling of Asphalt Pavements.

    DTIC Science & Technology

    1987-08-04

    WEARING SPECIFIED THICKNESS SURFACE • b. With ’Tew Aggregate, Modifier, And Asphalt ," ..’ . ,,, /f",’"" 4.. Figure 8. Typical Cold In-Place...34. .. .; ’-. , .?-. . ; ,....",.’.". ’. .- +-;-?,..- . .-’. , .. ’.,,..-, . ..- ?.,,,..-N ....-, ..,-. -".,,’." - HOT IN-PLACE RECYCLING OF ASPHALT PAVEMENTS An Engineering Report by0 Michael Lawrence Dowdy Submitted...for asphalt pavements. This type of asphalt pavement recycling process is becoming

  9. Implementation of noise budgets for civil airports

    DOE Office of Scientific and Technical Information (OSTI.GOV)

    Bishop, D.E.

    1982-01-01

    An increasing number of airports are faced with the need for establishing a lid on the noise from aircraft operations and for developing programs for reducing airport noise on a year-to-year basis. As an example, the California Airport Noise Standard acts to impose such programs on a number of airports in California. Any airport faced with the need to establish a quantitative reduction of noise obviously wants to achieve this reduction with the least impact on numbers of operations and reduction in air transportation services to the community. A reduction in noise and an increase in operations usually can bemore » achieved only by encouraging use of the quietest aircraft available and, further adding incentives for operating procedures that minimize noise. One approach in administering airport noise reduction is to adopt an airport noise budget. As used in this paper, the noise budget concept implies that quantitative limits on the noise environment and on the noise contributions by major airport users will be established. Having methods for enforcing compliance with the airport budget for those airport users that exceed their budget will be established. Thus, the noise budget provides airport management, and major airport users, with quantitative measures for defining noise goals, and actual progress in achieving such goals.« less

  10. Mechanistic design data from ODOT instrumented pavement sites : phase II report.

    DOT National Transportation Integrated Search

    2017-03-01

    This investigation examined data obtained from three previously-instrumented pavement test sites in Oregon. Data processing algorithms and templates were developed for each test site that facilitated full processing of all the data to build databases...

  11. Mechanistic design data from ODOT instrumented pavement sites : phase 1 report.

    DOT National Transportation Integrated Search

    2017-03-01

    This investigation examined data obtained from three previously-instrumented pavement test sites in Oregon. Data processing algorithms and templates were developed for each test site that facilitated full processing of all the data to build databases...

  12. 75 FR 41922 - Notice of Intent To Rule on Request To Release Airport Property at Fort Smith Regional Airport...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-07-19

    ... To Release Airport Property at Fort Smith Regional Airport, Fort Smith, AR AGENCY: Federal Aviation... rule and invites public comment on the release of land at Fort Smith Regional Airport under the.... John Parker, Airport Director, Fort Smith Regional Airport, at the following address: Fort Smith...

  13. A Guidance Document on Airport Noise Control.

    DTIC Science & Technology

    1980-08-01

    airport . This Document is one of the tools designed to help airport operators and planners reach that goal. It should aid the reader in applying the...into the five major areas where airport noise control can be applied : airport plans, airport / airspace use, aircraft operation, land use, and noise...flights to another airport is just another form of rescheduling, though it need not apply only to night operations. The FAA is concerned about the

  14. Assessment of Asphalt Concrete Reinforcement Grid in Flexible Pavements

    DTIC Science & Technology

    2016-05-01

    Guide for the Design of Pavement Structures (1993) remains in use and describes in detail the accepted procedures for both the design and maintenance...of pavement structures. Design considerations include pavement perfor- mance, traffic, subgrade soil, construction materials, environment, drain- age...Association of State Highway and Transportation Officials). 1993. Guide for the Design of Pavement Structures. Washington, DC: American Association of

  15. 19 CFR 122.84 - Intermediate airport.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 19 Customs Duties 1 2011-04-01 2011-04-01 false Intermediate airport. 122.84 Section 122.84... Intermediate airport. (a) Application. The provisions of this section apply at any U.S. airport to which an... aircraft arrives at the next airport, the aircraft commander or agent shall make entry by filing the: (1...

  16. 19 CFR 122.84 - Intermediate airport.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 19 Customs Duties 1 2010-04-01 2010-04-01 false Intermediate airport. 122.84 Section 122.84... Intermediate airport. (a) Application. The provisions of this section apply at any U.S. airport to which an... aircraft arrives at the next airport, the aircraft commander or agent shall make entry by filing the: (1...

  17. 19 CFR 122.84 - Intermediate airport.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 19 Customs Duties 1 2012-04-01 2012-04-01 false Intermediate airport. 122.84 Section 122.84... Intermediate airport. (a) Application. The provisions of this section apply at any U.S. airport to which an... aircraft arrives at the next airport, the aircraft commander or agent shall make entry by filing the: (1...

  18. 19 CFR 122.84 - Intermediate airport.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 19 Customs Duties 1 2014-04-01 2014-04-01 false Intermediate airport. 122.84 Section 122.84... Intermediate airport. (a) Application. The provisions of this section apply at any U.S. airport to which an... aircraft arrives at the next airport, the aircraft commander or agent shall make entry by filing the: (1...

  19. 19 CFR 122.84 - Intermediate airport.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 19 Customs Duties 1 2013-04-01 2013-04-01 false Intermediate airport. 122.84 Section 122.84... Intermediate airport. (a) Application. The provisions of this section apply at any U.S. airport to which an... aircraft arrives at the next airport, the aircraft commander or agent shall make entry by filing the: (1...

  20. Study of Georgia's pavement deterioration/life and potential risks of delayed pavement resurfacing and rehabilitation : final report.

    DOT National Transportation Integrated Search

    2016-08-01

    Georgia has continuously been rated as one of the states with the smoothest pavements in the United States because the Georgia Department of Transportation (GDOT) has established a standardized pavement condition evaluation system (PACES) for consist...

  1. Study of Georgia's pavement deterioration/life and potential risks of delayed pavement resurfacing and rehabilitation : final report.

    DOT National Transportation Integrated Search

    2016-08-01

    Georgia has continuously been rated as one of the states with the smoothest pavements in the United States : because the Georgia Department of Transportation (GDOT) has established a standardized pavement condition : evaluation system (PACES) for con...

  2. Crackscope : automatic pavement cracking inspection system.

    DOT National Transportation Integrated Search

    2008-08-01

    The CrackScope system is an automated pavement crack rating system consisting of a : digital line scan camera, laser-line illuminator, and proprietary crack detection and classification : software. CrackScope is able to perform real-time pavement ins...

  3. Texas flexible pavements and overlays : interim report for phases 2 and 3 - data collection and model calibration.

    DOT National Transportation Integrated Search

    2017-05-01

    This five-year project was initiated to collect materials and pavement performance data on a minimum of 100 : highway test sections around the state of Texas, incorporating both flexible pavements and overlays. Besides : being used to calibrate and v...

  4. Assessment of the performance of rigid pavement back-calculation through finite element modeling

    NASA Astrophysics Data System (ADS)

    Shoukry, Samir N.; William, Gergis W.; Martinelli, David R.

    1999-02-01

    This study focuses on examining the behavior of rigid pavement layers during the Falling Weight Deflectometer (FWD) test. Factors affecting the design of a concrete slab, such as whether the joints are doweled or undoweled and the spacing between the transverse joints, were considered in this study. Explicit finite element analysis was employed to investigate pavement layers' responses to the action of the impulse of the FWD test. Models of various dimensions were developed to satisfy the factors under consideration. The accuracy of the finite element models developed in this investigation was verified by comparing the finite element- generated deflection basin with that experimentally measured during an actual test. The results showed that the measured deflection basin can be reproduced through finite element modeling of the pavement structure. The resulting deflection basins from the use FE modeling was processed in order to backcalculate pavement layer moduli. This approach provides a method for the evaluation of the performance of existing backcalculation programs which are based on static elastic layer analysis. Based upon the previous studies conducted for the selection of software, three different backcalculation programs were chosen for the evaluation: MODULUS5.0, EVERCALC4.0, and MODCOMP3. The results indicate that ignoring the dynamic nature of the load may lead to crude results, especially during backcalculation procedures.

  5. Airport Performance and Construction Enlargement Activities

    NASA Astrophysics Data System (ADS)

    Hanun, Y.; Setiawan, M. I.; Kurniasih, N.; Hasyim, C.; Ahmar, A. S.

    2018-01-01

    The evaluation of transportation infrastructure project should consider the contribution towards infrastructure growth. This research aims to analyze the effect of Construction enlargement activities towards airport performance. This research is correlation study. The population includes 148 airports in Indonesia. By using total sampling, there were 148 sample airports. The result shows that the construction enlargement activities variable has relatively strong relationship to Airport Performance variable, while the adjusted R Square score shows the increasing construction enlargement activities that affected by the other factors aside from airport performance.

  6. 77 FR 44515 - Airport Improvement Program (AIP): Policy Regarding Access to Airports From Residential Property

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-07-30

    ... Committees. Going forward, the FAA expects sponsors of general aviation airports proposing to establish new... defined in the statute. However going forward, the FAA will apply the statutory prohibition on privately... activity onto the airport when feasible and practicable to do so. Going forward, airport sponsors proposing...

  7. 76 FR 18622 - Notice of Intent To Rule on Request To Release Airport Property at the Helena Regional Airport...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-04-04

    .... Ronald Mercer, Airport Director, Helena Regional Airport Authority (HRAA), at the following address: Mr. Ronald Mercer, Airport Director, Helena Regional Airport Authority, 2850 Skyway Drive, Helena, Montana...

  8. 14 CFR 125.49 - Airport requirements.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 14 Aeronautics and Space 3 2012-01-01 2012-01-01 false Airport requirements. 125.49 Section 125.49... Requirements § 125.49 Airport requirements. (a) No certificate holder may use any airport unless it is adequate...) No pilot of an airplane carrying passengers at night may take off from, or land on, an airport unless...

  9. 14 CFR 125.49 - Airport requirements.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 14 Aeronautics and Space 3 2013-01-01 2013-01-01 false Airport requirements. 125.49 Section 125.49... Requirements § 125.49 Airport requirements. (a) No certificate holder may use any airport unless it is adequate...) No pilot of an airplane carrying passengers at night may take off from, or land on, an airport unless...

  10. 14 CFR 125.49 - Airport requirements.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 14 Aeronautics and Space 3 2014-01-01 2014-01-01 false Airport requirements. 125.49 Section 125.49... Requirements § 125.49 Airport requirements. (a) No certificate holder may use any airport unless it is adequate...) No pilot of an airplane carrying passengers at night may take off from, or land on, an airport unless...

  11. Double layer drainage performance of porous asphalt pavement

    NASA Astrophysics Data System (ADS)

    Ji, Yangyang; Xie, Jianguang; Liu, Mingxi

    2018-06-01

    In order to improve the design reliability of the double layer porous asphalt pavement, the 3D seepage finite element method was used to study the drainage capacity of double layer PAC pavements with different geometric parameters. It revealed that the effect of pavement drainage length, slope, permeability coefficient and structure design on the drainage capacity. The research of this paper can provide reference for the design of double layer porous asphalt pavement in different rainfall intensity areas, and provide guides for the related engineering design.

  12. High performance concrete pavement in Indiana.

    DOT National Transportation Integrated Search

    2011-01-01

    Until the early 1990s, curling and warping of Portland cement concrete pavement did not concern : pavement engineers in many transportation agencies. Since beginning construction of the interstate system in the : United States in the late 1950s throu...

  13. Pavement marking extensions for deceleration lanes.

    DOT National Transportation Integrated Search

    1974-01-01

    Pavement markings have definite and important functions in a proper scheme of traffic control. One such marking, the pavement edge line, has received much favorable public reaction. One of the limitations of the edge line as conventionally applied is...

  14. Airport Fire and Rescue Personnel Protective Clothing

    DOT National Transportation Integrated Search

    1995-07-13

    This advisory circular (AC) identifies minimum standards for design, performance, : testing, and safety of personnel protective equipment (PPE), frequently referred : to as personnel protective clothing for airport firefighting. This AC also : assist...

  15. Airport Revenues: Galveston Municipal Airport; Scholes Field; Galveston, Texas; Federal Aviation Administration

    DOT National Transportation Integrated Search

    1997-11-07

    Our audit objectives were to determine whether (i) the city of Galveston, Texas : (city), was in compliance with its Airport Improvement Program grant assurances : and (ii) airport-generated revenues were used for the operating and capital cost : of ...

  16. Finite element simulation of structural performance on flexible pavements with stabilized base/treated subbase materials under accelerated loading.

    DOT National Transportation Integrated Search

    2011-12-01

    Accelerated pavement testing (APT) has been increasingly used by state highway agencies in recent years for evaluating pavement structures and/or materials. However, running an APT experiment is expensive. It requires costly accelerated loading devic...

  17. Design and construction of PCC pavements, volume 2 : design features and practices that influence performance of pavements.

    DOT National Transportation Integrated Search

    1998-10-01

    A study has been conducted to evaluate and analyze portland cement concrete (PCC) pavements in order to : develop recommendations for the design and construction of long-lived concrete pavements. It involved a : detailed evaluation and analysis of th...

  18. Analyses Relating to Pavement Material Characterizations and Their Effects......

    DOT National Transportation Integrated Search

    1998-01-01

    This report presents the analysis conducted on relating pavement performance or response measures and design considerations to specific pavement layers utilizing data contained in the Long Term Pavement Performance Program National Information Manage...

  19. Wet night visibility of pavement markings.

    DOT National Transportation Integrated Search

    2004-01-01

    This report describes an investigation into the performance of pavement markings in wet night conditions. The performance of a typical pavement marking will degrade when it gets wet. This is a result of the flooding of the marking optics, thereby red...

  20. 14 CFR 152.109 - Project eligibility: Airport planning.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 14 Aeronautics and Space 3 2014-01-01 2014-01-01 false Project eligibility: Airport planning. 152... TRANSPORTATION (CONTINUED) AIRPORTS AIRPORT AID PROGRAM Eligibility Requirements and Application Procedures § 152.109 Project eligibility: Airport planning. (a) Airport master planning. A proposed project for airport...

  1. 14 CFR 152.109 - Project eligibility: Airport planning.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 14 Aeronautics and Space 3 2013-01-01 2013-01-01 false Project eligibility: Airport planning. 152... TRANSPORTATION (CONTINUED) AIRPORTS AIRPORT AID PROGRAM Eligibility Requirements and Application Procedures § 152.109 Project eligibility: Airport planning. (a) Airport master planning. A proposed project for airport...

  2. 14 CFR 152.109 - Project eligibility: Airport planning.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 14 Aeronautics and Space 3 2011-01-01 2011-01-01 false Project eligibility: Airport planning. 152... TRANSPORTATION (CONTINUED) AIRPORTS AIRPORT AID PROGRAM Eligibility Requirements and Application Procedures § 152.109 Project eligibility: Airport planning. (a) Airport master planning. A proposed project for airport...

  3. 14 CFR 152.109 - Project eligibility: Airport planning.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 14 Aeronautics and Space 3 2012-01-01 2012-01-01 false Project eligibility: Airport planning. 152... TRANSPORTATION (CONTINUED) AIRPORTS AIRPORT AID PROGRAM Eligibility Requirements and Application Procedures § 152.109 Project eligibility: Airport planning. (a) Airport master planning. A proposed project for airport...

  4. GPR used in combination with other NDT methods for assessing pavements in PPP projects

    NASA Astrophysics Data System (ADS)

    Loizos, Andreas; Plati, Christina

    2014-05-01

    In the recent decades, Public-Private Partnerships (PPP) has been adopted for highway infrastructure procurement in many countries. PPP projects typically take the form of a section of highway and connecting roadways which are to be construction and managed for a given concession period. Over the course of the highway concession period, the private agency takes over the pavement maintenance and rehabilitation duties. On this purpose, it is critical to find the most cost effective way to maintain the infrastructure in compliance with the agreed upon performance measures and a Pavement Management Systems (PMS) is critical to the success of this process. For the prosperous operation of a PMS it is necessary to have appropriate procedures for pavement monitoring and evaluation, which is important in many areas of pavement engineering. Non Destructive Testing (NDT) has played a major role in pavement condition monitoring, assessments and evaluation accomplishing continuous and quick collection of pavement data. The analysis of this data can lead to indicators related to trigger values (criteria) that define the pavement condition based on which the pavement "health" is perceived helping decide whether there is the need or not to intervene in the pavement. The accomplished perception appoints required management activities for preserving pavements in favor not only of the involved highway/road agencies but also of users' service. Amongst NDT methods Ground Penetrating Radar (GPR) seems to be a very powerful toll, as it provides a range of condition and construction pavement information. It can support effectively the implementation of PMS activities in the framework of pavement monitoring and evaluation. Given that, the present work aims to the development and adaptation of a protocol for the use of GPR in combination with other NDT methods, such as Falling Weight Deflectometer (FWD), for assessing pavements in PPP projects. It is based on the experience of Laboratory of

  5. Evaluation of MDOT's Distress Thresholds for Maintained Pavement Projects

    DOT National Transportation Integrated Search

    2012-07-30

    As an alternative to traditional contracting, pavement warranty has been adopted in Mississippi since 2000, aimed to : enhance pavement performance and protect the investment in pavement construction. Currently, a manual distress survey : method and ...

  6. Evaluation of current Louisiana flexible pavement structures using PMS data and new mechanistic-empirical pavement design guide.

    DOT National Transportation Integrated Search

    2012-04-01

    The new Mechanistic-Empirical Pavement Design Guide (MEPDG) developed under the National Cooperative Highway Research Program (NCHRP) Project 1-37A represents a major change as compared to the 1993 AASHTO Pavement Design Guide. The MEPDG provides a r...

  7. Design and construction of PCC pavements. Volume 2, design features and practices that influence performance of pavements

    DOT National Transportation Integrated Search

    1998-10-01

    A study has been conducted to evaluate and analyze Portland cement concrete (PCC) pavements in order to develop recommendations for the design and construction of long-lived concrete pavements. In involved a detailed evaluation and analysis of the PC...

  8. Molecular mechanisms controlling pavement cell shape in Arabidopsis leaves.

    PubMed

    Qian, Pingping; Hou, Suiwen; Guo, Guangqin

    2009-08-01

    Pavement cells have an interlocking jigsaw puzzle-shaped leaf surface pattern. Twenty-three genes involved in the pavement cell morphogenesis were discovered until now. The mutations of these genes through various means lead to pavement cell shape defects, such as loss or lack of interdigitation, the reduction of lobing, gaps between lobe and neck regions in pavement cells, and distorted trichomes. These phenotypes are affected by the organization of microtubules and microfilaments. Microtubule bands are considered corresponding with the neck regions of the cell, while lobe formation depends on patches of microfilaments. The pathway of Rho of plant (ROP) GTPase signaling cascades regulates overall activity of the cytoskeleton in pavement cells. Some other proteins, in addition to the ROPs, SCAR/WAVE, and ARP2/3 complexes, are also involved in the pavement cell morphogenesis.

  9. Economic utilization of general aviation airport runways

    NASA Technical Reports Server (NTRS)

    Piper, R. R.

    1971-01-01

    The urban general aviation airport economics is studied in detail. The demand for airport services is discussed, and the different types of users are identified. The direct cost characteristics of the airport are summarized; costs to the airport owner are largely fixed, and, except at certain large airports, weight is not a significant factor in airport costs. The efficient use of an existing airport facility is explored, with the focus on the social cost of runway congestion as traffic density at the airport build up and queues form. The tradeoff between aircraft operating costs and airport costs is analyzed in terms of runway length. The transition from theory to practice is treated, and the policy of charging prices only on aircraft storage and fuel is felt likely to continue. Implications of the study from the standpoint of public policy include pricing that spreads traffic peaks to improve runway utilization, and pricing that discriminates against aircraft requiring long runways and causes owners to adopt V/STOL equipment.

  10. 78 FR 42419 - Airport Improvement Program (AIP): Policy Regarding Access to Airports From Residential Property

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-07-16

    ... assurances. In addition, Grant Assurance 29, Airport Layout Plan, was amended to require all proposed and... airport layout plan (ALP). A complete list of the current grant assurances can be viewed at: http://www... 29, Airport Layout Plan, should remain permissive; Using safety as a triggering event for a sponsor...

  11. 41 CFR 102-75.400 - Is industrial property located on an airport also considered to be “airport property”?

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 41 Public Contracts and Property Management 3 2010-07-01 2010-07-01 false Is industrial property located on an airport also considered to be âairport propertyâ? 102-75.400 Section 102-75.400 Public... Public Airports § 102-75.400 Is industrial property located on an airport also considered to be “airport...

  12. 41 CFR 102-75.400 - Is industrial property located on an airport also considered to be “airport property”?

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 41 Public Contracts and Property Management 3 2012-01-01 2012-01-01 false Is industrial property located on an airport also considered to be âairport propertyâ? 102-75.400 Section 102-75.400 Public... Public Airports § 102-75.400 Is industrial property located on an airport also considered to be “airport...

  13. 41 CFR 102-75.400 - Is industrial property located on an airport also considered to be “airport property”?

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 41 Public Contracts and Property Management 3 2011-01-01 2011-01-01 false Is industrial property located on an airport also considered to be âairport propertyâ? 102-75.400 Section 102-75.400 Public... Public Airports § 102-75.400 Is industrial property located on an airport also considered to be “airport...

  14. 41 CFR 102-75.400 - Is industrial property located on an airport also considered to be “airport property”?

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 41 Public Contracts and Property Management 3 2013-07-01 2013-07-01 false Is industrial property located on an airport also considered to be âairport propertyâ? 102-75.400 Section 102-75.400 Public... Public Airports § 102-75.400 Is industrial property located on an airport also considered to be “airport...

  15. 41 CFR 102-75.400 - Is industrial property located on an airport also considered to be “airport property”?

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 41 Public Contracts and Property Management 3 2014-01-01 2014-01-01 false Is industrial property located on an airport also considered to be âairport propertyâ? 102-75.400 Section 102-75.400 Public... Public Airports § 102-75.400 Is industrial property located on an airport also considered to be “airport...

  16. The Rigid Pavement Database: Overview and Data Collection Plan

    DOT National Transportation Integrated Search

    1998-06-01

    The rigid pavement (RP) database contains historical distress data obtained from more than 400 continuously reinforced concrete pavements(CRCP) and jointed concrete pavements (JCP) across the state of Texas. Data collection efforts began in 1974 and ...

  17. Composite pavement systems : synthesis of design and construction practices.

    DOT National Transportation Integrated Search

    2008-01-01

    Composite pavement systems have shown the potential for becoming a cost-effective pavement alternative for highways with high and heavy traffic volumes, especially in Europe. This study investigated the design and performance of composite pavement st...

  18. Building Airport Surface HITL Simulation Capability

    NASA Technical Reports Server (NTRS)

    Chinn, Fay Cherie

    2016-01-01

    FutureFlight Central is a high fidelity, real-time simulator designed to study surface operations and automation. As an air traffic control tower simulator, FFC allows stakeholders such as the FAA, controllers, pilots, airports, and airlines to develop and test advanced surface and terminal area concepts and automation including NextGen and beyond automation concepts and tools. These technologies will improve the safety, capacity and environmental issues facing the National Airspace system. FFC also has extensive video streaming capabilities, which combined with the 3-D database capability makes the facility ideal for any research needing an immersive virtual and or video environment. FutureFlight Central allows human in the loop testing which accommodates human interactions and errors giving a more complete picture than fast time simulations. This presentation describes FFCs capabilities and the components necessary to build an airport surface human in the loop simulation capability.

  19. The making of the modern airport executive: Causal connections among key attributes in career development, compromise, and satisfaction in airport management

    NASA Astrophysics Data System (ADS)

    Byers, David Alan

    The purpose of this study was to identify specific career development attributes of contemporary senior-level airport executives and to evaluate the relationship of these attributes to the level of satisfaction airport executives have in their career choice. Attribute sets that were examined included early aviation interests, health factors, psychological factors, demographic factors, formal education, and other aviation-related experiences. A hypothesized causal model that expressed direct and indirect effects among these attributes relative to airport executives' career satisfaction was tested using sample data collected from 708 airport executives from general aviation and commercial service airport throughout the United States. Applying a multiple regression analysis strategy to the model, the overall results revealed that 16% of the variability in airport executives' career satisfaction scores was due to the collective influence of the six research attribute sets, this was significant. The results of the path analysis also indicated that four attribute sets (early aviation interests, health factors, formal education, and other aviation-related experiences) had respective direct significant effects on participants' career satisfaction. Early aviation interests, health factors, and demographic factors had additional indirect effects on career satisfaction; all were mediated by formal education attitude. These results were inconsistent with the hypothesized path model and a revised model was developed to reflect the sample data. The findings suggest that airport executives, as a group, are satisfied with their career choice. Early aviation interests appear to play an important role for influencing the career field selection phase of career development. The study also suggests health factors, formal education, and other aviation-related experiences such as flight training or military experience influence the compromise phase of career development. Each of these

  20. A probabilistic and adaptive approach to modeling performance of pavement infrastructure

    DOT National Transportation Integrated Search

    2007-08-01

    Accurate prediction of pavement performance is critical to pavement management agencies. Reliable and accurate predictions of pavement infrastructure performance can save significant amounts of money for pavement infrastructure management agencies th...

  1. Local agency pavement marking plan : final report, July 2010.

    DOT National Transportation Integrated Search

    2010-07-01

    The proposed FHWA amendments to the MUTCD will change the way local agencies manage their pavement markings and places a : focus on pavement marking quality and management methods. This research effort demonstrates how a pavement marking maintenance ...

  2. Operational Safety on Airports During Construction

    DOT National Transportation Integrated Search

    1984-05-31

    This advisory circular (AC) sets forth guidelines concerning the operational : safety on airports during construction, to assist airport operators in complying : with Part 139, Certification and Operation: Land Airports Serving Certain Air : Carriers...

  3. Pavement markings and safety : tech transfer summary.

    DOT National Transportation Integrated Search

    2010-11-01

    Objective: This study explores the statistical relationship between crash occurrence probability and longitudinal pavement marking retroreflectivity. : Problem Statement: Previous research on pavement markings, from a safety perspective, tackled vari...

  4. Analysis of Unbound Aggregate Layer Deformation Behavior from Full Scale Aircraft Gear Loading with Wander

    ERIC Educational Resources Information Center

    Donovan, Phillip Raymond

    2009-01-01

    This study focuses on the analysis of the behavior of unbound aggregates to offset wheel loads. Test data from full-scale aircraft gear loading conducted at the National Airport Pavement Test Facility (NAPTF) by the Federal Aviation Administration (FAA) are used to investigate the effects of wander (offset loads) on the deformation behavior of…

  5. Airport Ground Access Planning Guide.

    DTIC Science & Technology

    1980-07-01

    30,000 daily passengers. On the other hand, express train/bus service to New York’s JFK Airport averaged about 1,000 passengers/ day in its first five...expected to depart New York’s JFK Airport during a peak ground traffic hour, and most of these vehicles are occupied by airport- based employees. It has

  6. Airport capacity enhancement plan

    DOT National Transportation Integrated Search

    1986-01-01

    The first edition of the Airport Capacity Enhancement Plan has been developed : by the Federal Aviation Administration's newly established Airport Capacity Program : Office (ACPO). The plan is intended to increase the capacity and efficient utiliza :...

  7. Quantification of the physical properties required of raised pavement markers and accelerated laboratory testing.

    DOT National Transportation Integrated Search

    2014-04-01

    Retroreflective raised pavement markers (RRPMs) can provide lane and directional information at : night, particularly during wet weather conditions. In recent years, the RRPM service life in Florida has : been generally shorter than expected. Moreove...

  8. Crack identification for rigid pavements using unmanned aerial vehicles

    NASA Astrophysics Data System (ADS)

    Bahaddin Ersoz, Ahmet; Pekcan, Onur; Teke, Turker

    2017-09-01

    Pavement condition assessment is an essential piece of modern pavement management systems as rehabilitation strategies are planned based upon its outcomes. For proper evaluation of existing pavements, they must be continuously and effectively monitored using practical means. Conventionally, truck-based pavement monitoring systems have been in-use in assessing the remaining life of in-service pavements. Although such systems produce accurate results, their use can be expensive and data processing can be time consuming, which make them infeasible considering the demand for quick pavement evaluation. To overcome such problems, Unmanned Aerial Vehicles (UAVs) can be used as an alternative as they are relatively cheaper and easier-to-use. In this study, we propose a UAV based pavement crack identification system for monitoring rigid pavements’ existing conditions. The system consists of recently introduced image processing algorithms used together with conventional machine learning techniques, both of which are used to perform detection of cracks on rigid pavements’ surface and their classification. Through image processing, the distinct features of labelled crack bodies are first obtained from the UAV based images and then used for training of a Support Vector Machine (SVM) model. The performance of the developed SVM model was assessed with a field study performed along a rigid pavement exposed to low traffic and serious temperature changes. Available cracks were classified using the UAV based system and obtained results indicate it ensures a good alternative solution for pavement monitoring applications.

  9. Evaluation of full depth asphaltic concrete pavements : final report.

    DOT National Transportation Integrated Search

    1982-10-01

    the aim of this study was to evaluate the full depth asphaltic concrete pavement design concept by observing the performance characteristics of two 13-inch pavements constructed in 1970. Pavement performance measurements, over an 11-year period, incl...

  10. Surveillance of ground vehicles for airport security

    NASA Astrophysics Data System (ADS)

    Blasch, Erik; Wang, Zhonghai; Shen, Dan; Ling, Haibin; Chen, Genshe

    2014-06-01

    Future surveillance systems will work in complex and cluttered environments which require systems engineering solutions for such applications such as airport ground surface management. In this paper, we highlight the use of a L1 video tracker for monitoring activities at an airport. We present methods of information fusion, entity detection, and activity analysis using airport videos for runway detection and airport terminal events. For coordinated airport security, automated ground surveillance enhances efficient and safe maneuvers for aircraft, unmanned air vehicles (UAVs) and unmanned ground vehicles (UGVs) operating within airport environments.

  11. Long-term Plan for Concrete Pavement Research and Technology--The Concrete Pavement Road Map : Volume II, Tracks

    DOT National Transportation Integrated Search

    2005-09-01

    The Long-Term Plan for Concrete Pavement Research and Technology (CP Road Map) is a holistic, strategic : plan for concrete pavement research and technology transfer. The CP Road Map is a 7- to 10-year plan that : includes 12 distinct but integrated ...

  12. Evaluation of pavement permeability in Mississippi.

    DOT National Transportation Integrated Search

    2003-07-01

    The proper compaction of hot mix asphalt (HMA) pavements is vital for a stable and durable pavement. For dense-graded mixtures, it has been recommended that the initial in-place air voids at the time of construction should not be below 3 percent or a...

  13. Design of a bituminous mixture for perpetual pavement

    NASA Astrophysics Data System (ADS)

    Gireesh Kumar, S.; Satya, J.; Mittal, Kratagya; Raju, Sridhar

    2018-03-01

    The flexible pavements with a design period of 50 years without requiring major structural rehabilitation and reconstructions are called as perpetual pavements. The present study aims at designing a high modulus Dense Bituminous Macadam (DBM) mixture for perpetual pavements using Industrial Grade (IG) bitumen in combination with Viscosity Grade (VG30) bitumen. Various blending combinations were tried and the ratio of 70:30 for IG: VG30 was found to fulfill the requirements. The modified Marshall hammer was used for the preparation of specimens, as the nominal size of aggregate was 25 mm. A comparative study on DBM mixture with VG30 alone and with IG: VG30 (70:30) was done and the Optimum Binder Contents obtained were 5.0 % and 5.3 % respectively at 4 % air voids. The water sensitivity tests were carried out on the bituminous specimens in accordance with AASHTO T 283 and the Indirect Tensile Strength (ITS) ratio obtained were 80.0 % and 98.3 % respectively for specimens with VG30 and IG: VG30. The stiffness modulus of DBM specimens with IG: VG30 bitumen was 3 times higher than DBM with VG30 bitumen.

  14. Serviceable pavement marking retroreflectivity levels : technical report.

    DOT National Transportation Integrated Search

    2009-03-01

    This research addressed an array of issues related to measuring pavement markings retroreflectivity, factors : related to pavement marking performance, subjective evaluation process, best practices for using mobile : retroreflectometers, sampling pav...

  15. Airport Capacity Enhancement Plan.

    DOT National Transportation Integrated Search

    1986-01-01

    The first edition of the Airport Capacity Enhancement Plan has been developed by the Federal Aviation Administration's newly established Airport Capacity Program Office (ACPO). The plan is intended to increase the capacity and efficient utilization o...

  16. Airport Capacity Enhancement Plan

    DOT National Transportation Integrated Search

    1987-01-01

    The first edition of the Airport Capacity Enhancement Plan has been developed by the Federal Aviation Administration's newly established Airport Capacity Program Office (ACPO). The plan is intended to increase the capacity and efficient utilization o...

  17. Seasonal variations in the moduli of unbound pavement layers.

    DOT National Transportation Integrated Search

    2006-07-01

    The in situ moduli of unbound pavement materials vary on a seasonal basis as a function of temperature and moisture conditions. : Knowledge of these variations is required for accurate prediction of pavement life for pavement design and other pavemen...

  18. Evaluation and analysis of LTPP pavement layer thickness data

    DOT National Transportation Integrated Search

    2002-07-30

    In 2001, the Federal Highway Administration sponsored a study to review pavement layer thickness data for Long Term Pavement Performance (LTPP) sites. The main objective of the study was to assess the quality and completeness of pavement layering inf...

  19. Performance of pavements designed with low-cost materials

    NASA Astrophysics Data System (ADS)

    Grau, R. W.; Yrjanson, W. A.; Packard, R. G.; Barksdale, R. D.; Potts, C. F.; Ruth, B. E.; Smith, L. L.; Huddleston, I. J.; Vinson, T. S.; Hicks, R. G.

    1980-04-01

    The following areas are discussed. Utilization of marginal aggregate materials for secondary road surface layers; econocrete pavements; current practices; construction and performance of sand-asphalt bases and performance of sand-asphalt and limerock pavements in Florida. Cement stabilization of degrading aggregates use of crushed stone screenings in highway construction (abridgement); and sulfur-asphalt pavement technology are also reviewed.

  20. 23 CFR 971.208 - Federal lands pavement management system (PMS).

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 23 Highways 1 2012-04-01 2012-04-01 false Federal lands pavement management system (PMS). 971.208... lands pavement management system (PMS). In addition to the requirements provided in § 971.204, the PMS... the concepts described in the AASHTO's “Pavement Management Guide.” 1 1 “Pavement Management Guide...

  1. 23 CFR 971.208 - Federal lands pavement management system (PMS).

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 23 Highways 1 2010-04-01 2010-04-01 false Federal lands pavement management system (PMS). 971.208... lands pavement management system (PMS). In addition to the requirements provided in § 971.204, the PMS... the concepts described in the AASHTO's “Pavement Management Guide.” 1 1 “Pavement Management Guide...

  2. 23 CFR 973.208 - Indian lands pavement management system (PMS).

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 23 Highways 1 2013-04-01 2013-04-01 false Indian lands pavement management system (PMS). 973.208... PROGRAM Bureau of Indian Affairs Management Systems § 973.208 Indian lands pavement management system (PMS... concepts described in the AASHTO's “Pavement Management Guide.” 1 1 “Pavement Management Guide,” AASHTO...

  3. 23 CFR 973.208 - Indian lands pavement management system (PMS).

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 23 Highways 1 2010-04-01 2010-04-01 false Indian lands pavement management system (PMS). 973.208... PROGRAM Bureau of Indian Affairs Management Systems § 973.208 Indian lands pavement management system (PMS... concepts described in the AASHTO's “Pavement Management Guide.” 1 1 “Pavement Management Guide,” AASHTO...

  4. 23 CFR 971.208 - Federal lands pavement management system (PMS).

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 23 Highways 1 2011-04-01 2011-04-01 false Federal lands pavement management system (PMS). 971.208... lands pavement management system (PMS). In addition to the requirements provided in § 971.204, the PMS... the concepts described in the AASHTO's “Pavement Management Guide.” 1 1 “Pavement Management Guide...

  5. 23 CFR 971.208 - Federal lands pavement management system (PMS).

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 23 Highways 1 2014-04-01 2014-04-01 false Federal lands pavement management system (PMS). 971.208... lands pavement management system (PMS). In addition to the requirements provided in § 971.204, the PMS... the concepts described in the AASHTO's “Pavement Management Guide.” 1 1 “Pavement Management Guide...

  6. 23 CFR 973.208 - Indian lands pavement management system (PMS).

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 23 Highways 1 2012-04-01 2012-04-01 false Indian lands pavement management system (PMS). 973.208... PROGRAM Bureau of Indian Affairs Management Systems § 973.208 Indian lands pavement management system (PMS... concepts described in the AASHTO's “Pavement Management Guide.” 1 1 “Pavement Management Guide,” AASHTO...

  7. 23 CFR 971.208 - Federal lands pavement management system (PMS).

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 23 Highways 1 2013-04-01 2013-04-01 false Federal lands pavement management system (PMS). 971.208... lands pavement management system (PMS). In addition to the requirements provided in § 971.204, the PMS... the concepts described in the AASHTO's “Pavement Management Guide.” 1 1 “Pavement Management Guide...

  8. 23 CFR 973.208 - Indian lands pavement management system (PMS).

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 23 Highways 1 2014-04-01 2014-04-01 false Indian lands pavement management system (PMS). 973.208... PROGRAM Bureau of Indian Affairs Management Systems § 973.208 Indian lands pavement management system (PMS... concepts described in the AASHTO's “Pavement Management Guide.” 1 1 “Pavement Management Guide,” AASHTO...

  9. 23 CFR 973.208 - Indian lands pavement management system (PMS).

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 23 Highways 1 2011-04-01 2011-04-01 false Indian lands pavement management system (PMS). 973.208... PROGRAM Bureau of Indian Affairs Management Systems § 973.208 Indian lands pavement management system (PMS... concepts described in the AASHTO's “Pavement Management Guide.” 1 1 “Pavement Management Guide,” AASHTO...

  10. Quantitative analysis of microtubule orientation in interdigitated leaf pavement cells

    PubMed Central

    Akita, Kae; Higaki, Takumi; Kutsuna, Natsumaro; Hasezawa, Seiichiro

    2015-01-01

    Leaf pavement cells are shaped like a jigsaw puzzle in most dicotyledon species. Molecular genetic studies have identified several genes required for pavement cells morphogenesis and proposed that microtubules play crucial roles in the interdigitation of pavement cells. In this study, we performed quantitative analysis of cortical microtubule orientation in leaf pavement cells in Arabidopsis thaliana. We captured confocal images of cortical microtubules in cotyledon leaf epidermis expressing GFP-tubulinβ and quantitatively evaluated the microtubule orientations relative to the pavement cell growth axis using original image processing techniques. Our results showed that microtubules kept parallel orientations to the growth axis during pavement cell growth. In addition, we showed that immersion treatment of seed cotyledons in solutions containing tubulin polymerization and depolymerization inhibitors decreased pavement cell complexity. Treatment with oryzalin and colchicine inhibited the symmetric division of guard mother cells. PMID:26039484

  11. Quantitative analysis of microtubule orientation in interdigitated leaf pavement cells.

    PubMed

    Akita, Kae; Higaki, Takumi; Kutsuna, Natsumaro; Hasezawa, Seiichiro

    2015-01-01

    Leaf pavement cells are shaped like a jigsaw puzzle in most dicotyledon species. Molecular genetic studies have identified several genes required for pavement cells morphogenesis and proposed that microtubules play crucial roles in the interdigitation of pavement cells. In this study, we performed quantitative analysis of cortical microtubule orientation in leaf pavement cells in Arabidopsis thaliana. We captured confocal images of cortical microtubules in cotyledon leaf epidermis expressing GFP-tubulinβ and quantitatively evaluated the microtubule orientations relative to the pavement cell growth axis using original image processing techniques. Our results showed that microtubules kept parallel orientations to the growth axis during pavement cell growth. In addition, we showed that immersion treatment of seed cotyledons in solutions containing tubulin polymerization and depolymerization inhibitors decreased pavement cell complexity. Treatment with oryzalin and colchicine inhibited the symmetric division of guard mother cells.

  12. Research of infrared laser based pavement imaging and crack detection

    NASA Astrophysics Data System (ADS)

    Hong, Hanyu; Wang, Shu; Zhang, Xiuhua; Jing, Genqiang

    2013-08-01

    Road crack detection is seriously affected by many factors in actual applications, such as some shadows, road signs, oil stains, high frequency noise and so on. Due to these factors, the current crack detection methods can not distinguish the cracks in complex scenes. In order to solve this problem, a novel method based on infrared laser pavement imaging is proposed. Firstly, single sensor laser pavement imaging system is adopted to obtain pavement images, high power laser line projector is well used to resist various shadows. Secondly, the crack extraction algorithm which has merged multiple features intelligently is proposed to extract crack information. In this step, the non-negative feature and contrast feature are used to extract the basic crack information, and circular projection based on linearity feature is applied to enhance the crack area and eliminate noise. A series of experiments have been performed to test the proposed method, which shows that the proposed automatic extraction method is effective and advanced.

  13. The application of non-destructive methods in the diagnostics of the approach pavement at the bridges

    NASA Astrophysics Data System (ADS)

    Miskiewicz, M.; Lachowicz, J.; Tysiac, P.; Jaskula, P.; Wilde, K.

    2018-05-01

    The article presents the possibility of using non-destructive methods of road pavement diagnostics as an alternative to traditional means to assess the reasons for premature cracks adjacent to bridge objects. Two scanning methods were used: laser scanning to measure geometric surface deformation and ground penetrating radar (GPR) inspection to assess the road pavement condition. With the use of a laser scanner, an effective tool for road deformation assessment several approach pavement surfaces next to the bridges were scanned. As the result, a point cloud was obtained including spatial information about the pavement deformation. The data accuracy was about 3 mm, the deformations were presented in the form of deviation maps between the reference surface and the actual surface. Moreover characteristic pavement surface cross-sections were presented. The in situ measurements of the GPR method were performed and analysed in order to detect non-homogeneity in the density of structural layers of the pavement. Due to the analysis of the permittivity of individual layers, it was possible to detect non-homogeneity areas. The performed GPR measurements were verified by standard invasive tests carried out by drilling boreholes and taking cores from the pavement and testing the compaction and air voids content in asphalt layers. As a result of the measurements made by both methods significant differences in layer compacting factor values were diagnosed. The factor was much smaller in the area directly next to the bridgehead and much larger in the zone located a few meters away. The research showed the occurrence of both design and erection errors as well as those related to the maintenance of engineering structures.

  14. Local calibration of the MEPDG for flexible pavement design.

    DOT National Transportation Integrated Search

    2011-10-01

    In an effort to move toward pavement designs that employ mechanistic principles, the AASHTO Joint : Task Force on Pavements initiated an effort in 1996 to develop an improved pavement design guide. The : project called for the development of a design...

  15. Utilize Cementitious High Carbon Fly Ash (CHCFA) to Stabilize Cold In-Place Recycled (CIR) Asphalt Pavement as Base Coarse

    DOE Office of Scientific and Technical Information (OSTI.GOV)

    Wen, Haifang; Li, Xiaojun; Edil, Tuncer

    The purpose of this study was to evaluate the performance of cementitious high carbon fly ash (CHCFA) stabilized recycled asphalt pavement as a base course material in a real world setting. Three test road cells were built at MnROAD facility in Minnesota. These cells have the same asphalt surface layers, subbases, and subgrades, but three different base courses: conventional crushed aggregates, untreated recycled pavement materials (RPM), and CHCFA stabilized RPM materials. During and after the construction of the three cells, laboratory and field tests were carried out to characterize the material properties. The test results were used in the mechanistic-empiricalmore » pavement design guide (MEPDG) to predict the pavement performance. Based on the performance prediction, the life cycle analyses of cost, energy consumption, and greenhouse gasses were performed. The leaching impacts of these three types of base materials were compared. The laboratory and field tests showed that fly ash stabilized RPM had higher modulus than crushed aggregate and RPM did. Based on the MEPDG performance prediction, the service life of the Cell 79 containing fly ash stabilized RPM, is 23.5 years, which is about twice the service life (11 years) of the Cell 77 with RPM base, and about three times the service life (7.5 years) of the Cell 78 with crushed aggregate base. The life cycle analysis indicated that the usage of the fly ash stabilized RPM as the base of the flexible pavement can significantly reduce the life cycle cost, the energy consumption, the greenhouse gases emission. Concentrations of many trace elements, particularly those with relatively low water quality standards, diminish over time as water flows through the pavement profile. For many elements, concentrations below US water drinking water quality standards are attained at the bottom of the pavement profile within 2-4 pore volumes of flow.« less

  16. 49 CFR 37.33 - Airport transportation systems.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... systems operated by public airport operators, which provide designated public transportation and connect.... Public airports which operate fixed route transportation systems are subject to the requirements of this... part. (b) Fixed-route transportation systems operated by public airport operators between the airport...

  17. Change in Stiffness of Pavement Layers in the Linear Discontinuous Deformation Area

    NASA Astrophysics Data System (ADS)

    Grygierek, Marcin

    2017-10-01

    The underground mining exploitation causes deformations on the surface of the area which are classified as continuous or discontinuous. Mining deformations cause loosening or compression of the subsoil. Loosening has an impact on the reduction of the subsoil stiffness. As a result the reduction of subsoil stiffness causes loosening of construction layers built in that subsoil. Pavement is a specific case. If there happens to be loosening then the fatigue life of pavement is reduced and premature damages can be observed such as fatigue cracks or/and structural deformation. Discontinuous deformations are an especially interesting case. They not only cause the reduction of the stiffness of the subsoil and pavement layers but also cause rapid deterioration in roughness. Change of roughness is very dangerous especially on fast roads such as a highway. Lately there can be observed the so called linear discontinuous surface deformations in the lanes in the mining area. Unfortunately, the ‘in situ’ research, presenting experiments on the effect of linear discontinuous deformations on the pavement, is in short supply. It is especially crucial with regard to the design of pavement reinforcement and the specification of optimal length of the reinforced part of the road. The article presents the results of ‘in situ’ tests carried out on the chosen pavements where the so called linear discontinuous surface deformation has appeared. The genesis of the damage is connected with the underground mining exploitation. Falling Weight Deflectometer (FWD) has been used in researches. Measuring points were carried out with high frequency which helped to acquire a very interesting distribution of deflections. The distribution of deflections well shows the impact of linear discontinuous deformation on the changes in stiffness pavement layers. In the analysis of data from FWD there has been used back calculation which worked modulus of layers out. The results of researches and

  18. Urban evaporation rates for water-permeable pavements.

    PubMed

    Starke, P; Göbel, P; Coldewey, W G

    2010-01-01

    In urban areas the natural water balance is disturbed. Infiltration and evaporation are reduced, resulting in a high surface runoff and a typical city climate, which can lead to floods and damages. Water-permeable pavements have a high infiltration rate that reduces surface runoff by increasing the groundwater recharge. The high water retention capacity of the street body of up to 51 l/m(2) and its connection via pores to the surface lead to higher evaporation rates than impermeable surfaces. A comparison of these two kinds of pavements shows a 16% increase in evaporation levels of water-permeable pavements. Furthermore, the evaporation from impermeable pavements is linked directly to rain events due to fast-drying surfaces. Water-permeable pavements show a more evenly distributed evaporation after a rain event. Cooling effects by evaporative heat loss can improve the city climate even several days after rain events. On a large scale use, uncomfortable weather like sultriness or dry heat can be prevented and the urban water balance can be attenuated towards the natural.

  19. Calibration of PMIS pavement performance prediction models.

    DOT National Transportation Integrated Search

    2012-02-01

    Improve the accuracy of TxDOTs existing pavement performance prediction models through calibrating these models using actual field data obtained from the Pavement Management Information System (PMIS). : Ensure logical performance superiority patte...

  20. Concrete pavement quality control testing requirements needed for the super air meter : technical summary.

    DOT National Transportation Integrated Search

    2016-10-01

    Concrete freeze-thaw durability is prominently linked to the air void system : within the concrete. Concrete pavements in Kansas undergo repetitive : freeze-thaw cycles. Total air content measurements currently used on fresh : concrete do not provide...

  1. 76 FR 70532 - Release of Airport Property: Melbourne International Airport, Melbourne, FL

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-11-14

    ... Melbourne Airport Authority to dispose of the property for other than aeronautical purposes. The property is... Drive in Brevard County, Florida. This parcel is adjacent to airport property and is currently vacant...-aeronautical purposes. DATES: Comments are due on or before December 14, 2011. ADDRESSES: Documents are...

  2. 77 FR 12906 - Notice of Intent To Rule on Request To Release Airport Property at the Dubois Regional Airport...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-03-02

    ... To Release Airport Property at the Dubois Regional Airport, Reynoldsville, PA AGENCY: Federal Aviation Administration (FAA) DOT. ACTION: Notice of request to release airport property. SUMMARY: The FAA... Airport, Reynoldsville, Pennsylvania under the provisions of Section 47125(a) of Title 49 United States...

  3. A new structure of permeable pavement for mitigating urban heat island.

    PubMed

    Liu, Yong; Li, Tian; Peng, Hangyu

    2018-09-01

    The urban heat island (UHI) effect has been a great threat to human habitation, and how to mitigate this problem has been a global concern over decades. This paper addresses the cooling effect of a novel permeable pavement called evaporation-enhancing permeable pavement, which has capillary columns in aggregate and a liner at the bottom. To explore the efficiency of mitigating the UHI, bench-scale permeable pavement units with capillary columns were developed and compared with conventional permeable pavement. Criteria of capillary capacities of the column, evaporation rates, and surface temperature of the pavements were monitored under simulated rainfall and Shanghai local weather conditions. Results show the capillary column was important in increasing evaporation by lifting water from the bottom to the surface, and the evaporation-enhancing permeable pavement was cooler than a conventional permeable pavement by as much as 9.4°C during the experimental period. Moreover, the cooling effect of the former pavement could persist more than seven days under the condition of no further rainfall. Statistical analysis result reveals that evaporation-enhancing permeable pavement can mitigate the UHI effect significantly more than a conventional permeable pavement. Copyright © 2018 Elsevier B.V. All rights reserved.

  4. Joint sealant materials for concrete pavement repairs.

    DOT National Transportation Integrated Search

    1991-01-01

    This report on joint sealant materials for concrete pavement repairs is based on conversations with specialists from several states, the Federal Highway Administration, the Portland Cement Association, and the American Concrete Pavement Association, ...

  5. Precast concrete pavement - systems and performance review

    NASA Astrophysics Data System (ADS)

    Novak, Josef; Kohoutková, Alena; Křístek, Vladimír; Vodička, Jan

    2017-09-01

    Long-term traffic restrictions belong to the key disadvantages of conventional cast-in-plane concrete pavements which have been used for technical structures such as roads, parking place and airfield pavements. As a consequence, the pressure is put on the development of such systems which have short construction time, low production costs, long-term durability, low maintenance requirements etc.. The paper presents the first step in the development of an entirely new precast concrete pavement (PCP) system applicable to airfield and highway pavements. The main objective of the review of PCP systems is to acquire a better understanding of the current systems and design methods used for transport infrastructure. There is lack of information on using PCP systems for the construction of entirely new pavements. To most extensive experience is dated back to the 20th century when hexagonal slab panels and system PAG were used in the Soviet Union for the military airfields. Since cast-in-situ pavements became more common, the systems based on precast concrete panels have been mainly utilized for the removal of damaged sections of existing structures including roads, highways etc.. Namely, it concerns Fort Miller Super Slab system, Michigan system, Uretek Stitch system and Kwik system. The presented review indicates several issues associated with the listed PCP systems and their applications to the repair and rehabilitation of existing structures. Among others, the type of manufacturing technology, particularly the position of slots for dowel bars, affects the durability and performance of the systems. Gathered information serve for the development of a new system for airfield and highway pavement construction.

  6. LTPP pavement maintenance materials : SHRP joint reseal experiment, final report.

    DOT National Transportation Integrated Search

    1999-09-01

    The Strategic Highway Research Program (SHRP) H-106 maintenance experiment and the Federal Highway : Administration (FHWA) Long-Term Monitoring (LTM) of Pavement Maintenance Materials Test Sites project studied : the resealing of joints in concrete p...

  7. Development of a non-solvent based test method for evaluating reclaimed asphalt pavement mixes.

    DOT National Transportation Integrated Search

    2004-09-01

    The percent of reclaimed asphalt pavement (RAP) used in hot mix asphalt (HMA) is currently established either by arbitrarily setting maximum percent limits, or alternatively, by evaluating both the virgin and recovered binder properties. The first ap...

  8. Concrete pavement quality control testing requirements needed for the super air meter : final report.

    DOT National Transportation Integrated Search

    2016-10-01

    Concrete freeze-thaw durability is prominently linked to the air void system within the concrete. : Concrete pavements in Kansas undergo repetitive freeze-thaw cycles. Total air content measurements : currently used on fresh concrete do not provide a...

  9. Phase I AGTC Survey Airport Interviews

    DOT National Transportation Integrated Search

    1972-09-01

    This report presents the results of interviews conducted with airport management and FAA tower personnel during a survey of nine U.S. airports. This survey was conducted in December 1971 and January 1972 as part of a nationwide Airport Ground Traffic...

  10. Missouri airport investment study

    DOT National Transportation Integrated Search

    The studys purpose is to provide MoDOT with insight to the potential ROI for airport : investments in terms of economic development. To do so, this study addresses two central : objectives: first, an approach to evaluate airport investments; and s...

  11. The Airport Performance Model

    DOT National Transportation Integrated Search

    1976-04-01

    This report describes the development of a model and companion data base for evaluating levels and qualities of service provided to the public by Air Carrier Airports. The model is designed to translate changes in airport capabilities into public ser...

  12. 49 CFR 1542.113 - Airport tenant security programs.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 49 Transportation 9 2011-10-01 2011-10-01 false Airport tenant security programs. 1542.113 Section... SECURITY ADMINISTRATION, DEPARTMENT OF HOMELAND SECURITY CIVIL AVIATION SECURITY AIRPORT SECURITY Airport Security Program § 1542.113 Airport tenant security programs. (a) TSA may approve an airport tenant...

  13. 49 CFR 1542.113 - Airport tenant security programs.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 49 Transportation 9 2013-10-01 2013-10-01 false Airport tenant security programs. 1542.113 Section... SECURITY ADMINISTRATION, DEPARTMENT OF HOMELAND SECURITY CIVIL AVIATION SECURITY AIRPORT SECURITY Airport Security Program § 1542.113 Airport tenant security programs. (a) TSA may approve an airport tenant...

  14. 49 CFR 1542.113 - Airport tenant security programs.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 49 Transportation 9 2010-10-01 2010-10-01 false Airport tenant security programs. 1542.113 Section... SECURITY ADMINISTRATION, DEPARTMENT OF HOMELAND SECURITY CIVIL AVIATION SECURITY AIRPORT SECURITY Airport Security Program § 1542.113 Airport tenant security programs. (a) TSA may approve an airport tenant...

  15. 49 CFR 1542.113 - Airport tenant security programs.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 49 Transportation 9 2014-10-01 2014-10-01 false Airport tenant security programs. 1542.113 Section... SECURITY ADMINISTRATION, DEPARTMENT OF HOMELAND SECURITY CIVIL AVIATION SECURITY AIRPORT SECURITY Airport Security Program § 1542.113 Airport tenant security programs. (a) TSA may approve an airport tenant...

  16. 49 CFR 1542.113 - Airport tenant security programs.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 49 Transportation 9 2012-10-01 2012-10-01 false Airport tenant security programs. 1542.113 Section... SECURITY ADMINISTRATION, DEPARTMENT OF HOMELAND SECURITY CIVIL AVIATION SECURITY AIRPORT SECURITY Airport Security Program § 1542.113 Airport tenant security programs. (a) TSA may approve an airport tenant...

  17. 76 FR 30422 - Notice of Intent To Rule on Request To Release Airport Property at the Helena Regional Airport...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-05-25

    ... To Release Airport Property at the Helena Regional Airport, Helena, Montana AGENCY: Federal Aviation Administration (FAA), Department of Transportation (DOT). ACTION: Notice of Request to Release Airport Property... Airport (HLN) under the provisions of Section 125 of the Wendell H. Ford Aviation Investment Reform Act...

  18. 76 FR 23854 - Notice of Intent To Rule on Request To Release Airport Property at the Dubois Regional Airport...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-04-28

    ... To Release Airport Property at the Dubois Regional Airport, Reynoldsville, PA AGENCY: Federal Aviation Administration (FAA) DOT. ACTION: Notice of request to release airport property. SUMMARY: The FAA proposes to rule and invite public comment on the release of land at the Dubois Regional Airport...

  19. Interference and Noise in and Adjacent to the Loran-C Spectrum at Airports

    DOT National Transportation Integrated Search

    1980-05-01

    Electrical noise and interference in the LORAN-C frequency band was measured at two rural airports in Vermont and a major airport in Boston, Mass. The purpose of the test program was to determine the potential interfering sources that could affect th...

  20. Learning from history: The Glasgow Airport terrorist attack.

    PubMed

    Crichton, Gillies

    Glasgow Airport was the target of a terrorist attack on 30th June, 2007. Many people within Scotland had come to believe that Scotland was immune from terrorism. This perception was in large part informed by Scotland's experience during the protracted Troubles in Northern Ireland, during which the Provisional Irish Republican Army's mainland bombing campaign focused on targets in England, sparing both Scotland and Wales. While Glasgow Airport did not expect such an attack to take place, meticulous planning, organising and testing of plans had taken place to mitigate the unlikely event of such an attack. The attack stands up as a shining example of robust business continuity management, where the airport reopened for business as usual in less than 24 hours from the time of the attack. Little is known about how the airport handled the situation in conjunction with other responding agencies as people tend to want to focus on high-profile disasters only. Yet countless such incidents are happening worldwide on a daily basis, in which there are excellent learning opportunities, and, taken in the spirit of converting hindsight into foresight, the likelihood of similar incidents could potentially be reduced in the future.