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Who is Tested?

What CDL Drivers Need to Know

Generally, all CDL drivers who operate commercial motor vehicles subject to the CDL requirements on public roads in the U.S. are performing safety-sensitive functions and are subject to DOT drug and alcohol testing (§382.103). This includes all full-time, part-time, intermittent, backup and international drivers.

Find out which substances are tested >>

Learn more about the Drug and Alcohol Clearinghouse