近几年来我国高速公路建设发展较快，高速公路行车具有舒适、快速的优点，但有较多司机对高速公路的性能还不了解，车辆由受约束受干扰的低等级公路进入宽阔无干扰的高速公路，盲目高速行车，容易造成交通事故。高速公路交通事故相对来说是较少，但高速公路一旦发生交通事故，? In recent years, China’s expressway construction has developed rapidly, and the expressway driving has the advantages of comfort and speed. However, more drivers do not understand the performance of the expressway and the vehicles enter a wide, undisturbed Highway, blind high-speed driving, easily lead to traffic accidents. Expressway traffic accidents are relatively small, but in the event of a highway accident,?