Subtitle A—Office of the Secretary of Transportation (Parts 1–99)
Subtitle B—Other Regulations Relating to Transportation

• Chapter I. Pipeline and Hazardous Materials Safety Administration, Department of Transportation (Parts 100–199)
• Chapter II. Federal Railroad Administration, Department of Transportation (Parts 200–299)
• Chapter III. Federal MotorCarrier Safety Administration, Department of Transportation (Parts 300–399)
• Chapter IV. Coast Guard, Department of Homeland Security (Parts 400–499)
  • 450. General
  • 451. Testing and approval of containers
  • 452. Examination of containers
  • 453. Control and enforcement
• Chapter V. National Highway Traffic Safety Adminstration, Department of Transportation (Parts 500–599)
• Chapter VI. Federal Transit Administration, Department of Transportation (Parts 600–699)
• Chapter VII. National Railroad Passenger Corporation (AMTRAK) (Parts 700–799)
  • 700. Organization, functioning and available information
  • 701. Amtrak Freedom of Information Act program
• Chapter VIII. National Transportation Safety Board (Parts 800–999)
• Chapter X. Surface Transportation Board, Department of Transportation (Parts 1000–1399)
• Chapter XI. Research and Innovative Technology Administration, Department of Transportation (Parts 1400–1499)
  • 1420. Reports of motor carriers
• Chapter XII. Transportation Security Administration, Department of Homeland Security (Parts 1500–1699)