DOT (Department of Transportation)

Federal department overseeing all transportation modes in the United States, including regulations for commercial driver health and drug/alcohol testing.

Key Facts

  • Oversees FMCSA, FAA, FRA, FTA, PHMSA, and other agencies
  • Drug/alcohol testing mandated under 49 CFR Part 40
  • DOT testing uses a standardized 5-panel urine test
  • Regulates safety across highways, aviation, rail, transit, and pipelines

The US Department of Transportation encompasses agencies like FMCSA, FAA, FRA, FTA, and PHMSA, each regulating different transportation modes. In occupational health, "DOT" commonly refers to DOT-regulated drug and alcohol testing (49 CFR Part 40) and DOT physical examinations required for commercial motor vehicle operators. DOT testing uses a strict 5-panel urine drug test and follows chain-of-custody procedures through certified laboratories.

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