To operate a motor vehicle on Michigan's public streets and highways, you must have a valid driver's license or permit. You will be given a vision test as part of the examination process to see if your vision satisfies minimum standards. The purpose of the Michigan DMV written test is to assess your knowledge of road signs, traffic laws, and safe driving practices. The Michigan Driver's Manual contains all you need to know. There are 50 questions on the DMV knowledge test. To pass the MI DMV written test, you must score at least 80% (40 correct answers). Let's start with our Michigan driving test practice now.