为提高山区干线公路的安全与畅通水平,在公路定位分析的基础上,根据每个类型交叉口的服务人口、转向特征及其在附近居民出行中的重要地位,对交叉口进行科学合理的分类,再根据各种类型平面交叉口的通行特征采取封闭、合并归口、上跨或下穿等技术措施,在不影响沿线居民日常生产、生活出行的前提下,实现了控制交叉口数量,提高公路安全与畅通效益的目的。 In order to improve the safety and smoothness of highways in mountainous areas, based on the analysis of highway positioning, based on the service population and the turning characteristics of each type of intersection and its important position in the travel of nearby residents, the intersection is classified scientifically and rationally And then adopt the technical measures such as closure, merging, crossing or crossing and other technical measures according to the traffic characteristics of various types of plane intersections. Without affecting the daily production and living activities of residents along the line, the number of intersections to be controlled and the number of highways Safety and smooth benefits of the purpose.