A:
Alternative Fuels and Advanced Vehicles Data Center - A comprehensive clearinghouse of data, publications, tools, and information related to advanced transportation technologies. [Department of Energy (DOE)]

B:
Bridges - Science Tracer Bullet - Bridges - Science Tracer Bullets - Research Finding Aids from the Library of Congress, Science Reference Services. [Library of Congress]

D:
Department of Energy Vehicle Technologies Program - Develops more energy efficient and environmentally friendly highway transportation technologies that enable America to use less petroleum. [Department of Energy (DOE)]