General
- President's Commission on Critical Infrastructure Protection
- Bureau of Transportation Statistics
- FAA File Search
- FHWA Office of Highway Information Management Reports, Publications and Statistics
- Front Range Infrastructure Resource Project - Providing the public and decision makers with objective information about the location and characteristics of land, natural aggregate, water, and energy resources that are vital to sustaining an area and its infrastructure. - U.S. Geological Survey (USGS)
- Motor Vehicles, Fuels, Nonroad Engines - Environmental Protection Agency (EPA) Office of Mobile Sources
- National Transportation Library
- Rural Development: About Rural Development, Business and Cooperative Programs, Housing and Community, Utility Programs, and Community Development & Empowerment Programs
- Transportation Policy and the Environment - Environmental Protection Agency's (EPA) Office of Policy, Planning and Evaluation, Transportation Group.
Code of Federal Regulations
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