A physical exam can result in a few different outcomes, depending on your doctor's findings. In the event the medical examiner does not find any health conditions serious enough to affect your driving ability, you may be able to drive for two years. It is possible to be able to drive, but you may need regular health monitoring. And it is also possible that you might have too many serious health issues to qualify for CDL. DOT Physical Exams usually take less than an hour to complete. Make sure you follow FMCSA guidelines and bring all the necessary and valid documents for the examination. Upon completing your DOT physicals, the physician will begin the documentation process.