高速公路互通式立体交叉设计中的连续出口和入口间距设计

Design of Continuous Exit and Entrance Distance in Interchange Design of Interworking Freeway

对高速公路互通式立体交叉设计中的主线同侧出入口最小间距设计进行了研究。根据道路通行能力手册HCM2000,并且对高速公路上的车流道路进行观察和计算,从而对于公路上进入主要路线和合流的车辆交通量和车辆入口出口处的间隔距离,主要对不设置辅助车道条件下,对于高速主道路和侧路的匝道入口出口出的最小间距,设置在辅助道路的条件下的主道路中同侧车辆出入口的最小间距两种情况进行了分析;对于这两种情况下的通车交流下的出入口最小间距建立了模型并进行分析计算;提出了以上游匝道的设计速度、主道理的设计速度、匝道形式的高速公路主道路和同侧匝道入口的最小间距的指标值。

This paper studies the design of the minimum distance between the main line and the outlet of the main line in the interchange design of interconnected freeway.According to the Highway Capacity Manual HCM2000,determine the traffic into the diffluence and confluence affect zone outside the two lane and the inlet and outlet spacing,mainly on the same side line does not set the auxiliary lane under the condition of the exit ramp minimum spacing,line set auxiliary lane under the condition of the same side into the minimum distance of two export was analyzed.The establishment of two cases of ipsilateral main entrance continuous minimum distance calculation model.Put forward the main highway upstream ramp design speed and design speed,the main ramp forms based on the same side entrance continuous minimum distance index.