由于汽车技术的迅速发展和道路条件的不断改善，汽车的行驶速度普遍提高得很快；同时一些商用汽车的大型化发展，其最大总质量也有不同程度的增加，从而增加了车辆行驶的惯性。另一方面，随着汽车保有量的急剧增加，道路行车密度日益增大，导致交通事故不断发生，已引起了公众? Due to the rapid development of automobile technology and continuous improvement of road conditions, the traveling speed of automobiles generally increases rapidly. Meanwhile, the large-scale development of some commercial vehicles also increases the maximum total mass to some extent, thereby increasing the inertia of vehicles. On the other hand, with the dramatic increase in the number of car ownership, the increasing traffic density of roads has led to the continuous occurrence of traffic accidents that have caused the public?