快速路出入口组合类型适用性研究  

Research on the applicability of different kinds of exit and entrance combination modes on expressway

作　　者：石建军[1] 刘晨强 SHI Jianjun;LIU Chenqiang(Beijing Key Laboratory of Transportation Engineering,Beijing University of Technology,Beijing 100124,China)

机构地区：[1]北京工业大学交通工程北京市重点实验室,北京100124

出　　处：《交通科技与经济》2018年第6期17-21,80,共6页Technology & Economy in Areas of Communications

基　　金：北京市教委重点项目(KZ201510005007)

摘　　要：快速路交织区是快速路运行的瓶颈路段,而不同的出入口组合类型将使交织区的位置发生改变,从而影响主路和辅路的通行能力。以先入后出和先出后入两种出入口组合类型为研究对象,研究其在设计服务交通量,不同汇入和汇出比下的适用性。首先,利用Traffic Analysis软件和自编Visual Basic半自动数车程序提取北京四环调查视频中的交通参数;其次,以调查的几何参数为基础搭建VISSIM仿真,并利用提取的交通参数对VISSIM进行标定;最后,以仿真得到的出入口处通过车辆数、地点车速、延误和排队长度,以及主路和辅路行程时间等评价指标和建立的DEA和AHP模型,对两种出口组合类型进行评价,探讨不同出入口组合类型的适用性。The weaving segment on urban expressway is the bottleneck for the traffic operation, which will impact on the capacity of expressway and the side road of expressway. With different kinds of exit and entrance combination modes, the position of weaving segment will be changed. This paper, taking Entrance Exit and Exit Entrance modes as subject, identifies its influence on expressway and the side road of expressway, and explores its applicability with different merging and diverging＇s ratios at the design service volume. First, it extracts the traffic parameters, traffic volume and spot speed, from the video observation of the Fourth Ring in Beijing using the software of Traffic Analysis and the vehicle counter coded by Visual Basic. Second, with the geometric characteristics of roadway, this paper establishes and calibrates the VISSIM simulation model, and extracts the volume, spot speed, delay, the queue length at the exit and entrance, and the travel time of mainline and the side road as evolution indices. Finally, it establishes a DEA/AHP model to exp]ore the applicability of different kinds of exit and entrance combination modes. The result will be useful for exit and entrance design of expressway.

关 键 词：快速路 辅路 VISSIM仿真 DEA/AHP模型 

分 类 号：U121[交通运输工程]