US Department of Transportation
Office of the Assistant General Counsel for Regulation and Enforcement (C-50)

List of DOT Operating Administration Regulatory Responsibilities

The following is a list of DOT's Operating Administrations and the Office of the Secretary (OST) and their regulatory responsibilities; click on the Operating Administration/OST names and you will be directed to their regulatory websites.  This information should help you identify which DOT agency may issue regulations in your area of interest.  That agency's regulatory website or this website may provide you with the information you need or you may want to contact an official on the List of DOT Regulatory Contacts for additional information:

Federal Aviation Administration (FAA)

  • Aviation Safety and Operations
  • Certification of Airmen, Aircraft, and Airports
  • Commercial Space Transportation
  • Airport and Airway Fees and Charges
  • Requirements for Foreign Air Carriers Operating in the U.S. and U.S.-owned Aircraft Outside the U.S.

Federal Highway Administration (FHWA)

  • Federal-Aid Highway
  • Highways and Roads (e.g., Federal roads)

Federal Motor Carrier Safety Administration (FMCSA)

  • Motor Carrier and Bus Safety
  • Motor Carrier Operations
  • Motor Carrier Equipment
  • Commercial Drivers License
  • Hours of Service
  • Grants

Federal Railroad Administration (FRA)

  • Railroad Equipment
  • Railroad Operations
  • Railroad Financial Assistance
  • Engineer Qualifications/Certification
  • Railroad Workplace Safety

Federal Transit Administration (FTA)

  • Financial Assistance
  • Safety

Maritime Administration (MARAD)

  • Financial Assistance
  • Cargo Preference

National Highway Traffic Safety Administration (NHTSA)

  • Vehicle Safety
  • Fuel Economy
  • Highway Safety Programs (e.g., Age 21/drinking)
  • Consumer Information (e.g., Uniform Tire Quality Grading Standards)

Office of the Secretary (OST)

  • Conflict of Interest
  • Public Availability (FOIA)
  • Privacy Act
  • Transportation of the Disabled
  • Disadvantaged/Women Business Enterprises
  • Aviation Economic, Consumer and Antitrust
  • Procurement
  • Time Act
  • Alcohol and Drug Testing
  • Seismic Standards
  • Airline Tariffs
  • Federal Advisory Committees
  • Passenger Manifest
  • Transportation Infrastructure Finance and Innovation Act of 1998 Credit Assistance Programs
  • Delegations

Pipeline and Hazardous Material Safety Administration (PHMSA)

  • Hazardous Materials
  • Pipeline Safety 

Research and Innovative Technology Administration (RITA)

  • Airline Statistics
  • Motor Carrier Statistics
  • University Transportation Grants

Saint Lawrence Seaway Development Corporation (SLSDC)

  • Tolls
  • Seaway Operations