CDL Endorsements and Restrictions: Maximizing Your Commercial Driving Capabilities

Required for vehicles carrying hazardous materials. Involves passing a written knowledge test. Learn more about the HazMat endorsement.

For operating tank vehicles transporting liquids or gases. Requires a written knowledge test. Learn more about the Tanker endorsement.

Necessary for vehicles seating 16 or more, including the driver. Involves both written and road skills tests. Learn more about the Passenger endorsement.

For school bus drivers, requiring a P endorsement as a prerequisite. Includes a written test, road test, application forms, fees, and a background check. Learn more about the School Bus endorsement.

Allows towing of double or triple trailers. Requires a written knowledge test. Learn more about the Double/Triple Trailer endorsement.

A combination endorsement for hazardous materials and tank vehicles. Involves a written knowledge test.

Prohibits operating vehicles with a manual transmission if tested with an automatic.

Prohibits travel to other states while driving a CMV.

Disallows the operation of vehicles with a full air brake system unless tested on one.

Limits drivers to operating Class B or C passenger vehicles or school buses, depending on the vehicle used for testing.

Restricts drivers to operating only Class C passenger vehicles or school buses, based on the testing vehicle class.

Prohibits driving Class A vehicles with a non-fifth wheel connection.

Indicates a medical variance as reported by the FMCSA, including conditions like diabetes or hearing impairment.

Prohibits operation of CMVs equipped with full air brakes unless tested on one.