The Federal Highway Administration, part of the United States'
Department of Transportation, is the government agency responsible for the issuance,
administration, and enforcement of Federal Motor Carrier Regulations (FMCSR). The
FMCSRs are found at 49 Code of Federal Regulations (CFR) Parts 325, 350, and 382-399.
The Hazardous Materials Regulations are found at 49 CFR Parts 100-180. In
addition, 49 CFR Part 40 regulates drug and alcohol testing requirements for motor
carriers.
