Truck Crash Reference

Commercial driver drug and alcohol testing

Last updated . Sources checked

Contents
  1. Different tests answer different requirements
  2. Post-accident triggers and timing
  3. Medical care and interpretation
  4. Related entries
  5. References
Commercial driver drug and alcohol testing
Scope49 CFR 382.103[1]
Post-accident rule49 CFR 382.303; not every crash triggers testing[2]

Part 382 governs controlled-substances and alcohol testing for drivers and employers within its scope, principally commercial driving subject to commercial driver license requirements. It is not a rule requiring every person driving any truck to take every type of test. Post-crash testing has specific triggers and time limits that must be checked against the event.[1][2]

See: Carrier records, preservation and spoliation

Different tests answer different requirements

The rules address pre-employment controlled-substances testing, random testing and reasonable-suspicion testing, among other categories. Section 382.301 contains conditions and exceptions for pre-employment testing. Section 382.701 also requires specified Clearinghouse queries. A negative result from one occasion does not establish compliance with every other testing or qualification obligation, and random testing should not be confused with testing triggered by a particular collision.[3][4][5]

Post-accident triggers and timing

Section 382.303 requires testing in covered fatal crashes. For specified injury or disabling-damage crashes, the driver's receipt of a moving-traffic citation arising from the crash is also part of the trigger, with timing distinctions for alcohol and controlled substances. If an alcohol test is not administered within two hours, reasons must be documented; attempts cease after eight hours. Controlled-substances testing attempts cease after 32 hours.[2]

Medical care and interpretation

The post-accident rule does not authorize delaying necessary medical attention. It requires documentation when testing cannot be completed within the allowed time. Reasonable-suspicion testing under Section 382.307 depends on specific observations and has its own requirements. The presence or absence of a test should therefore be assessed against the rule that actually applied, not treated as automatic proof of impairment or its absence.[2][6]

  • Carrier records, preservation and spoliation Qualification files and carrier trip or maintenance records, with distinctions between retention schedules and litigation duties.
  • Truck driver fatigue The federal fatigue prohibition, its relationship to driving limits and the limits of log-based conclusions.
  • Liability in truck crashes Separate questions for drivers, carriers, cargo participants, brokers and manufacturers, including a 2026 Supreme Court decision.
  • FMCSA and federal trucking rules What federal motor-carrier safety rules cover, and why a vehicle description alone does not establish which rules apply.

References

  1. ab 49 CFR 382.103: Applicability of drug and alcohol rules. Electronic Code of Federal Regulations, Office of the Federal Register and GPO. https://www.ecfr.gov/current/title-49/section-382.103. official. Checked . Source record
  2. abcd 49 CFR 382.303: Post-accident testing. Electronic Code of Federal Regulations, Office of the Federal Register and GPO. https://www.ecfr.gov/current/title-49/section-382.303. official. Checked . Source record
  3. ^ 49 CFR 382.301: Pre-employment testing. Electronic Code of Federal Regulations, Office of the Federal Register and GPO. https://www.ecfr.gov/current/title-49/section-382.301. official. Checked . Source record
  4. ^ 49 CFR 382.305: Random testing. Electronic Code of Federal Regulations, Office of the Federal Register and GPO. https://www.ecfr.gov/current/title-49/section-382.305. official. Checked . Source record
  5. ^ 49 CFR 382.701: Drug and Alcohol Clearinghouse queries. Electronic Code of Federal Regulations, Office of the Federal Register and GPO. https://www.ecfr.gov/current/title-49/section-382.701. official. Checked . Source record
  6. ^ 49 CFR 382.307: Reasonable suspicion testing. Electronic Code of Federal Regulations, Office of the Federal Register and GPO. https://www.ecfr.gov/current/title-49/section-382.307. official. Checked . Source record