Why do we have the following traffic laws? You must drive with a seat belt on. You must drive with a seat belt on. You cannot drive faster that the posted speed limit. You cannot drive faster that the posted speed limit. You cannot drive without insurance. You cannot drive without insurance. You cannot drive without a license. You cannot drive without a license. You cannot tailgate. You cannot tailgate. You cannot drive under the influence. You cannot drive under the influence. Because of multiple violations, you must lose your license. Because of multiple violations, you must lose your license