公路是综合交通运输体系的重要组成部分,是经济社会发展的重要基础设施保障,相应的公路网规划也是城乡规划和综合交通规划的重要内容。在新型城镇化发展要求下,公路面临从“增量拓展”转为“存量优化、结构优化以及精细供给”的转型发展要求。现状公路规划布局和工程设计还是以传统的行政等级、技术等级形成的功能层次体系为主的方法,在 The highway is an important part of the integrated transport system and an important infrastructure guarantee for economic and social development. The corresponding road network planning is also an important part of urban and rural planning and integrated transport planning. Under the requirements of new urbanization development, the highway faces the transformation and development requirements from “incremental expansion” to “stock optimization, structural optimization and fine supply”. The status quo Highway layout and engineering design or to the traditional administrative levels, technical hierarchy formed by the functional hierarchy-based approach