- U.S. Department of Transportation
- Official site featuring DOT news and safety information. - Aviation Consumer Protection Division
- Featuring air travel consumer reports, aviation rules and standards, and airline customer service plans. - Bureau of Transportation Statistics (6)
- Deaf Employees Association (DEAFDOT)
- Membership consists of DOT employees who have an interest in promoting the status of deaf and hearing impaired people and people with disabilities. - Federal Aviation Administration (FAA) (25)
- Federal Highway Administration (13)
- Federal Motor Carrier Safety Administration (FMCSA)
 - Federal Railroad Administration (1)
- Federal Transit Administration (FTA) (2)
- National Highway Traffic Safety Administration (NHTSA) (6)
- National Transportation Library
- Offering timely access to the information that supports transportation policy, research, operations, and technology transfer activities. - Office of Hazardous Materials Safety
- Hazardous materials rules and regulations, training, enforcement, publications and reports. - Office of the Chief Information Officer
- Provides information regarding the information resources management/information technology activities within the U.S. Department of Transportation. - Office of the Inspector General
- Works within the Department of Transportation to promote effectiveness and head off, or stop, waste, fraud and abuse in departmental programmes. - Public Affairs Information
- Contains press releases and statements. - Research and Special Programs Administration (7)
- Surface Transportation Board
- Independent, bipartisan adjudicatory body with jurisdiction over certain regulatory matters. Site includes news releases, board decisions, publications, and transportation data. - Transportation Administration Service Center
- Provides a variety of services, products and training courses for Federal and State governments. - Transportation Safety Institute
- Provides training to improve air, ground, pipeline, and rail transportation safety and security. - U.S. Maritime Administration
- Promotes the development and maintenance of an adequate merchant marine, sufficient to carry the Nation's domestic waterborne commerce, and capable of serving as a naval and military auxiliary in time of war or national emergency. - U.S.Department of Transportation

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