Educational disclaimer

CDL Prep Hub is an independent study resource. We are not affiliated with, endorsed by, or sponsored by the Federal Motor Carrier Safety Administration (FMCSA), the American Association of Motor Vehicle Administrators (AAMVA), the Commercial Driver License Information System (CDLIS), the Transportation Security Administration (TSA), or any state Department of Motor Vehicles.

The practice questions on this site are written based on the public AAMVA Model Commercial Driver License Manual and the publicly available Federal Motor Carrier Safety Regulations. They are intended for educational use only. Passing every test on this site does not guarantee you will pass your state's official CDL knowledge exam or your state's behind-the-wheel skills test. Always confirm the current rules with your state's DMV before testing or driving a commercial motor vehicle.

Federal and state CDL regulations change. Where the answer to a question on this site differs from the answer in your state's current CDL handbook, the state handbook controls. Please let us know if you spot a discrepancy and we will review.

Operating a commercial motor vehicle without the proper CDL, endorsements, and medical certification is a federal violation. This site does not authorize you to operate any commercial vehicle.