Oversees federal highway, air, railroad, and maritime and other transportation administration functions; components include the FAA, FHA, FRA, NHTSA, OIG, and STB. Site links to related agencies and organizations, safety resources, and current news.

Provides online access to documents and databases covering all aspects of transportation in the US. Material is contributed by public and private organizations around the country and access is free.

An organization within the U.S. Department of Transportation's Research and Special Programs Administration dedicated to enhancing the effectiveness, efficiency, and responsiveness of other Federal organizations with critical transportation-related functions and missions.