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United States Department of Transportation
Learning Center
Select Your Role
View learning materials tailored to your role by selecting your Clearinghouse user role below. You can also view a list of all materials in the Resource Library or access Clearinghouse updates on the Clearinghouse News page.
Materials are also available for U.S. DOT safety officials and State Driver Licensing Agencies (login required).
Driver
CDL- or CLP-holder who meets the requirements of CDL standards (49 CFR part 383) and FMCSA's Drug and Alcohol Testing Program (part 382).
Student Driver
Driver-trainee enrolled in an independent (not employer-based) CDL training program
Owner-Operator
Self-employed CDL driver who drives for a company they operate under their own authority.
Employer
Employer of CDL- and CLP-holders subject to the Clearinghouse requirements.
C/TPA
Consortium/third-party administrator who acts as a service agent for an employer or a student driver.
MRO
Medical review officer responsible for reporting positive test results and test refusals.
SAP
Substance abuse professional who evaluates the CDL driver and recommends education/ treatment, follow-up tests, and aftercare.
