The amount of time it takes to get a commercial driver's license depends on the length of time to get a permit and pass the required testing. A driver must have the commercial license permit for at least 14 days before taking the final tests.
Some states require medical clearance prior to getting a commercial learners permit. After getting this permit, the driver practices driving for a minimum of two weeks then applies to take the skills test. There is a manual for commercial driving that needs to be studied in order to pass the skills test. Some tests require a certain amount of training before taking the test. Three parts of the skills test must be passed to get the commercial driver's license, including the basic controls test, vehicle inspection test and road test.