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Trucking witnesses press Congress to permit wider use of hair‑follicle testing and to address marijuana impairment and the clearinghouse gap
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Summary
The Truckload Carriers Association and other witnesses urged Congress to allow hair‑follicle drug testing, citing data showing higher detection rates than urine testing and gaps in reporting to the national Clearinghouse.
Industry witnesses told the House subcommittee that current drug‑testing rules limit carriers’ ability to detect drug use and to report positive hair‑follicle tests to the National Drug and Alcohol Clearinghouse.
John Elliott, testifying for the Truckload Carriers Association, described a multi‑carrier study and urged legislative or regulatory fixes to allow hair‑follicle testing and Clearinghouse reporting. "Hair follicle testing detects drug use 11 times more effectively than urine," Elliott said during his testimony, and he cited carrier screening data in which thousands more positives were detected by hair tests than by urine tests. Elliott said carriers were unable to submit hair‑test results to the Clearinghouse, allowing drivers who failed hair tests to seek work elsewhere under current urine‑based reporting rules.
Members raised the impact of state marijuana legalization and the difficulty of real‑time impairment testing; witnesses said a roadside, breathalyzer‑style test for cannabis does not yet exist and urged accelerated development of impairment diagnostics so enforcement can focus on real‑time impairment rather than the presence of a metabolite days or weeks later.
The subcommittee did not adopt changes at the hearing. Witnesses and members asked FMCSA and DOT to review testing rules and data sharing with the Clearinghouse as part of reauthorization and related oversight work.
