Fail a DOT Drug Test

What CDL Drivers Need to Know

You fail a drug or alcohol test by testing positive to a drug test, or registering a 0.04 or greater alcohol content. Either of these results requires you to be immediately removed from performing safety-sensitive functions (i.e., driving CMVs) until successful completion of the return-to-duty process with a DOT-qualified substance abuse professional.

Your refusal to submit to a drug or alcohol test is generally equivalent to testing positive to a drug or alcohol test. You must immediately be removed from performing safety-sensitive functions (i.e., driving CMVs) until successful completion of the return-to-duty process with a DOT-qualified substance abuse professional.