Class A CDL License – Any combination of vehicles weighing 26,001 or more pounds provided the vehicle(s) being towed is in excess of 10,000 pounds. You also need this license to drive across state lines. Careers that require a Class A CDL include but are not limited to: Interstate Tractor-Trailer Driver.

Class B CDL Description. A Class B CDL allows a driver to operate commercial trucks that have an attached cab and cargo area with a combined weight greater than 26,000 pounds, as well as trucks with a detached towed cargo vehicle that weighs less than 10,000 pounds.