Federal Government
- Bureau of Transportation Statistics
- FAA Information Services
- Federal Transit Administration
- Federal Highway Administration (FHWA)
- Federal Register (U.S. Government Printing Office)
- National Highway Traffic Safety Administration
- National Rural Development Partnership
- U.S. Department of Commerce
- U.S. Department of Energy: Energy Efficiency and Renewable Energy
- U.S. Department of Transportation
- U.S. Department of Transportation, Office of the Secretary of Transportation
- U.S. House of Representatives
- U.S. House of Representatives Committee on Transportation and Infrastructure
- U.S. Senate
- U.S. State and Local Gateway