Drug & Alcohol Clearinghouse Horror Story!

To Let CDL Drivers Know About The Drug & Alcohol Clearinghouse By The FMCSA.DOT clearinghouse.... United States Department of Transportation. FMCSA. Federal Motor Carrier Safety Administration. Clearinghouse Status and CDL Downgrades. The Clearinghouse contains information about holders of commercial driver’s licenses (CDLs) and commercial learner’s permits (CLPs) who are covered by FMCSA’s Drug and Alcohol Testing Program.