自高速公路问世以来，经过几十年的发展，美国、德国、日本等西方发达国家已完全实现了公路养护机械化。目前，世界各国对公路的养护都很重视，都已综合考虑路面的规划、设计、修筑、养护、使用等问题，并通过对路面质量的定量评价而建立起路面养护系统（如英国的ＢＳＭ养护系 Since the advent of the highway, after several decades of development, developed western countries such as the United States, Germany and Japan have completely mechanized road maintenance. At present, all countries in the world attach great importance to the maintenance of roads. They have all considered issues such as the planning, design, construction, maintenance and use of pavements and have established pavement maintenance systems (such as BSM conservation in the United Kingdom system