Commercial driver's license (CDL) is a driver's license required in the United States to operate any type of vehicle weighing more than 10,001 lb (4536 kg) for commercial use, or transports quantities of hazardous materials that require warning placards under Department of Transportation regulations, or that is designed to transport 9 or more passengers (including driver) for compensation, or 16 or more passengers (including the driver), for noncompensation. This includes, but is not limited to, tow trucks, tractor trailers, and buses.

This app includes CDL test prep (CDL study guide) for various categories:
-> General Knowledge
-> Hazardous Materials Test (cdl hazmat test)
-> Passenger Vehicles
-> Air Brake
-> Combination Vehicles
-> Doubles/ Triples Trailers
-> Tanker Vehicles
-> School Bus