If you live in Louisiana and want to drive a motor vehicle on public roads or highways, you must obtain a Louisiana driver's license or driving permit. When you apply for a driver's license, you may be tested on your vision, knowledge of traffic signs and signals, understanding of traffic laws, and road skills. The purpose of the Louisiana DMV written test is to assess your knowledge of road signs, rules of the road, traffic laws, and safe driving practices. The Louisiana Driver's Manual contains all of the information you'll need. There are 40 questions on the Louisiana DMV written test, and you must get at least 32 accurate answers to pass (80%). Let's start with our Louisiana practice driving test now.