Classes of CDL

Learner's Permit

• Federal law determines that a CDL learner's permit is valid for a maximum of six months. It entitles a driver to operate a CMV only when accompanied in the passenger seat by someone who has held a regular driver's license for no less than five years and the relevant class of CDL for two or more years. For example, if a learner truck driver wishes to drive a class B CMV, he should be joined in the cab by a class B license holder.

Class A

• Class A CDLs are required to operate any combination of vehicles with a gross vehicle weight rating (GVWR) of 26,001 pounds or more, provided that at least one trailing vehicle weighs greater than 10,000 pounds. For example, a single heavy truck, weighing more than 26,000 pounds, and three trailers, the first of which weighs 12,000 pounds, would require a class A license.

Class B

• Holders of a class B CDL are qualified to operate any single vehicle with a GVWR in excess of 26,000 pounds or any combination of CMVs, provided all trailers weigh less than 10,000 pounds. A heavy truck, with a GVWR of 31,000, towing a small trailer, which weighs 1,500 pounds, would require a class B license.

Class C

• A class C CDL is defined as a vehicle that does not meet either the requirements of a class A or B license, but does carry 16 or more occupants (including the driver) or is transporting goods that require HazMat placards. For example, a class C license (as well as a further endorsement) is necessary to drive a school bus. Furthermore, a driver must hold a class C license (and a further endorsement) to drive vehicles containing explosives, compressed gases and flammable liquids and solids, among other hazardous materials.

Further Endorsements

• Six further endorsements are available, and indeed necessary in some cases, for CDL drivers. If a motorist wishes to operate a vehicle such as a school bus, which is afforded greater significance because of its precious cargo, she must gain a class S endorsement by passing both an additional written and practical examination. A class H endorsement is necessary to operate any CMV that must display HazMat placards.