L Restriction: Prohibits operation of a vehicle containing a full air brake system.

Occurs when you take your skills test in a CMV with automatic transmission.

E Restriction: Prohibits you from operating vehicles with a manual transmission.

CDL Restrictions A restriction placed on your commercial driver's license may keep you from operating certain types of vehicles.Ĭommon federal CDL restriction codes are listed below: Check with your state to determine the exact process required for adding an endorsement to your commercial driver license.

X Endorsement: Combination endorsement for HAZMAT and tank vehicles.Requires an additional knowledge test.T Endorsement: Allows you to tow a double or triple trailer.See our guide to passenger and school bus endorsements. ALSO requires separate application forms, fees, and background checks.S Endorsement: Permits the operation of a school bus.Requires written knowledge AND road skills tests.P Endorsement: Allows you to operate a vehicle that carries over a specified number of passengers (the exact number may depend on your state).Requires an additional written knowledge test.N Endorsement: Permits you to operate tank vehicles.H Endorsement: Required for vehicles containing hazardous materials.

Below is a list of the federal endorsement codes you may need in addition to your CDL and what tests will be required by your state. CDL Endorsements After you have satisfied the requirements for a, you may also need to pass additional written and road driving tests to operate special types of commercial motor vehicles. In either case, additional testing and fees will be required. In order to drive certain types of vehicles with a commercial driver's license (CDL), it may be necessary to add an endorsement or remove a restriction. Drivers license restriction may be different in your state, please make sure to check your state-specific restrictions: B restriction. In order to provide you with an example of what the drivers license restriction codes may be like, here is a list of restrictions that work in Wyoming.

Driver S License Restriction B Illinois