城市快速路出入口间距设计研究——以北京西三环某出入口改造工程为例

以北京西三环内环丰益桥至丽泽桥段出入口改造为背景，对先入后出的出入口间距进行了分析探讨。分析比较了第7版美国Highway Capacity Manual（2022年版）（以下简称HCM2022）和周荣贵《公路通行能力手册》对交织区通行能力、运行速度、服务水平的计算结果，对先入后出的出入口间距设计提出了一些建议。基于案例背景，选择流量比、交织区长度为影响因子，分别采用周荣贵的分析方法和HCM2022的分析方法对通行能力、运行速度的敏感性进行对比，分析了两种方法的差异。

Research on Design of Entrance and Exit Spacing of Urban Expressway in Beijing

Taking the reconstruction of the entrance and exit at the section of Fengyi Bridge - Lize Bridge in the inner ring of West Ring III Road in Beijing as the background, the entrance and exit spacing is analyzed and discussed. The calculation results of traffic capacity, running speed and service level of the interleaved area are analyzed and compared according to the 7th edition of the US Highway Capacity Manual (2022 edition) (hereinafter referred to as HCM2022) and ZHOU Ronggui''s Highway Capacity Manual. Some suggestions for the entrance and exit spacing are put forward. Based on the case background, by selecting the flow ratio and length of interleaved area as the influencing factors, the analysis methods of ZHOU Ronggui and HCM2022 are used to compare the sensitivity of traffic capacity and running speed, and the difference of the two methods is analyzed.