Current problems of traffic accidents increased in both volume and intensity. In Thailand, road accidents cause injuries. Disabilities, and deaths are increasing every year. A rate of 12.8, 18.4 , 20.9 and 20.5 per lakh population in the year 2541 to 2544 ( Health Information Center . Health Policy and Planning Ministry of Health ), the leading cause of accidents on the road . Has many academic disciplines to study the causes of major accidents caused by two factors: unsafe acts and behaviors . Which may cause accidents , such as negligence, negligent breach of the rules , and so caused by a condition that is unsafe and environment may cause accidents such as damaged roads is not enough light curves , etc. In summary, the major factors that have an impact. of accidents in traffic and road vehicles who use the road and the environment. The prevention of accidents in traffic . Therefore, to solve the root cause of such problems by focusing on 3 main is to provide education about traffic knowledge . Attitudes and practices Mandatory controls to ensure compliance with the law. Improve infrastructure and traffic engineering .