A bill introduced on July 10, 2025, H.R. 4320, the Drug & Alcohol Clearinghouse Public Safety Improvement Act, would allow positive hair drug test results to be entered into the FMCSA Drug & Alcohol Clearinghouse. Proponents, including the Trucking Alliance, argue that hair testing detects drug use up to 90 days and closes safety gaps. Opponents like OOIDA counter that hair tests may be racially biased and less effective at detecting recent use.
