城市道路主辅路出入口设计形式探讨

Discussion on the Design Form of Entrances and Exits between Main Traffic Lane and Auxiliary Lane of Urban Roads

从城市道路设计经验出发,探讨了现行城市道路设计中出入口常用形式和存在的问题;对出入口车辆进行碰撞建模,探讨了车辆在出入口交通转换过程中的视野盲区变化、碰撞速度包络区间、驾驶员反应时间包络区间等问题,并根据城市道路建设管理经验,实现了定量评价。将城市快速路、城市快捷路和城市主干路三种等级道路纳入体系一起研究,并首次提出根据道路等级和设计速度对应采用三种出入口类型的建议。

This article,based on the experience of urban road design,has discussed the common forms and existing problems of entrances and exits in the current urban road design;Through the collision model of vehicles at the entrance and exit,we make a quantitative analysis for the following problems such as the changes of blind area of visual field,the envelope interval of collision speed and the envelope interval of driver reaction time,which based on the experience of urban road construction management.The three grades of urban expressway,urban convenient road and urban trunk road have been studied together,and the suggestion of adopting three types of entrances and exits according to the road grade and design speed is put forward for the first time.