With the development of industry and its impact on the climate, haze has become more and more severe throughout the country in recent years. The haze causes low outdoor visibility. Such weather is a great problem for transportation, especially the highway. Highways often cause serious traffic accidents due to haze weather. Once an accident occurs, it will be a tragedy. In order to reduce security risks, the government usually adopt road closures and other methods, which have brought a lot of inconvenience and economic losses.