The main components of the general knowledge test for a CDL Class A license include questions pertaining to compliance with Department of Transportation laws, the rules of the road, emergency actions for unexpected situations and map reading. Additional topics include trip planning, hooking a trailer, skid avoidance and vehicle recovery.
The road test is also a key element of acquiring a Class A CDL license. The road driving test measures the driver's ability to inspect the vehicle prior to the test and evaluates basic vehicle control and on-road driving. In addition to the general knowledge test, individuals can also opt to test on hazardous materials, air brakes, school bus driving, requirements to haul liquids in bulk and techniques to drive double or triple trailers.
Many drivers working toward a commercial driver's license enroll in educational classes or programs to train. Written tests are typically taken in conjunction with a commercial driver's license educational program offered by a truck driving school. In addition to written tests, to obtain a CDL Class A license, most states require that the driver is at least 21 years of age to drive on the interstate and 18 for intrastate driving. In addition, a Department of Transportation physical exam is often required as well as drug test screening test. When applying for a Class A CDL license, individuals must produce a valid driver's license from their state of residence.