Washington, D.C. — The Federal Motor Carrier Safety Administration’s drug‑testing advisory board has yet to issue a final rule that would formalize hair‑sample testing for commercial drivers, six years after Congress ordered a regulatory process.
The FAST Act, signed into law in December 2015, gave the FMCSA authority to add hair analysis as a permissible method for detecting drug use among CDL‑A drivers and owner‑operators. Hair testing offers a detection window that stretches months beyond the few days covered by urine or saliva tests, giving carriers a longer look‑back period to spot chronic substance abuse.
During a closed session earlier this month, board members reviewed a draft superseding rule that could replace the current guidance. The meeting, reported by Transport Topics, left participants vague on when the White House might sign the rule into law. Concerns cited by the board include the risk of external contamination of hair samples and the possibility of racial bias influencing results.
J.B. Hunt, a major carrier that began using hair testing for employees and job applicants in 2006, has long championed the method as more reliable for identifying habitual drug use than urine testing. The company’s experience underscores why many in the industry favor hair analysis: it reduces the chance that a single positive test stems from a one‑time exposure.
What This Means for Drivers
Until the rule is finalized, carriers can continue to request hair tests on a voluntary basis, but they lack a uniform federal mandate to enforce it across all fleets. CDL‑A drivers and owner‑operators should expect that some trucking companies will keep hair testing as part of their pre‑employment screening, especially those that already rely on the method for safety compliance. Fleet managers may need to maintain dual testing protocols—hair for long‑term monitoring and urine for immediate detection—to stay ahead of potential regulatory changes.
Industry Reaction
Industry groups have expressed frustration with the prolonged timeline, noting that the uncertainty hampers consistent safety programs. Some carriers argue that waiting for a definitive rule forces them to invest in parallel testing systems, driving up compliance costs. Advocates for driver rights warn that the board’s concerns about racial bias could lead to legal challenges if the final rule does not address sample‑handling safeguards.
Key Points
- Congress mandated a hair‑testing regulatory process in 2015 under the FAST Act.
- The advisory board discussed a draft superseding rule in a closed meeting but gave no clear White House signing date.
- Hair testing provides a detection window far longer than urine or saliva methods, appealing to carriers like J.B. Hunt.
- Board officials flagged external contamination and potential racial bias as hurdles to final approval.
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