目前我国公路建设进入了一个新的发展时期,高等级公路的通车里程迅速增加,预计到“七五”期末,高速公路里程达到500公里以上,包括二级汽车专用公路以上的高等级公路里程将达到3000公里以上。高等级公路上交通量大、车速高,为了保证公路安全畅通、高效的营运和行车舒适,就必然对养护和管理工作 At present, China’s highway construction has entered a new period of development. The mileage of high-grade highways is rapidly increasing. It is estimated that the mileage of highways will reach over 500 kilometers by the end of the “Seventh Five-Year Plan”, including the mileage of high- Reach more than 3000 kilometers. Traffic on high-grade highways, high speed, in order to ensure safe and smooth highway, efficient operation and driving comfort, it is bound to conservation and management work