DOT Regulated Drug & Alcohol Testing

As a result of the Omnibus Transportation Employee Testing Act of 1991, the following DOT Agencies established drug and alcohol testing regulations to ensure that aircraft, trains, trucks, and buses were operated in a safe and responsible manner.
Federal Aviation Administration (FAA) — required for flight crews, flight attendants, aircraft dispatchers, ground security coordinators
Federal Motor Carrier Safety Administration (FMCSA) — required for Commercial Driver’s License (CDL) holders who operate Commercial Motor Vehicles (CMVs), vehicles that carry 16 passengers or more (including the driver), or vehicles that transport hazardous materials
Federal Railroad Administration (FRA) — required for Hours of Service Act personnel, engine & train workers, signal service workers, or train dispatchers
Federal Transit Administration (FTA) — required for vehicle operators, controllers, mechanics, and armed security
Pipeline & Hazardous Materials Safety Administration (PHMSA) — required for operations, maintenance, and emergency response workers
U.S. Coast Guard (USCG) (now with the Department of Homeland Security) — required for crew members operating a commercial vessel
DOT drug tests require laboratory testing (49 CFR Part 40 Subpart F) for the following five classes of drugs:
Marijuana
Cocaine
Opiates – opium and codeine derivatives
Amphetamines and Methamphetamines
Phencyclidine - PCP
DOT drug tests are required in the following situations:
Pre-employment — before you start your job responsibilities
Reasonable suspicion — if a trained supervisor reasonably believes you are under the influence of drugs, based on observation
Random testing — each employee has an equal chance to be selected and tested quarterly
Return-to-duty — required after a violation of drug and alcohol policy
Follow-up — for up to 5 years following return-to-duty, a Substance Abuse Professional (SAP) manages the follow-up testing
Post-accident — if you’re involved in an accident meeting certain DOT criteria, an alcohol test must occur within 8 hours of the accident, and a drug test within 32 hours