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United States Department of Transportation United States Department of Transportation

Testing Procedures

What CDL Drivers Need to Know

The DOT drug and alcohol testing procedures are extensive and can be found in 49 CFR Part 40 Subpart E and Part 40 Subpart L, respectively. It is important for drivers to understand the testing process in order to ensure proper procedures are followed to protect their own interests. An employee handbook titled What Employees Need to Know about DOT Drug and Alcohol Testing is available on the US DOT Office of Drug and Alcohol Policy and Compliance (ODAPC) website. The employee handbook provides valuable information on how a urine test is administered and how an alcohol test is administered to ensure the validity of the testing as well as to protect the confidentiality of the employee's testing information.

To further facilitate drivers obtaining this knowledge, we recommend reviewing the mock urine collection instructional video offered on the ODAPC web site. Watch the video >>

Learn the consequences of a failed or refused test >>

FMCSA

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Last updated: Tuesday, December 31, 2019