无信号交叉口冲突与延误的研究

Conflicts and Delay Studies for Unsignalized Intersections

本文介绍了自行编制的无信号交叉口的计算机仿真模型。根据对无信号交叉口车流运行特性的分析,建议以冲突次数和延误作为无信号交叉口的服务水平评价指标,其中冲突数用于反映交叉口车辆行驶的安全性,延误则作为经济效益分析的指标。本文还导出了无信号交叉口冲突数的计算公式,并与仿真作了比较,证明它能够用于无信号交叉口。本文最后通过无信号交叉口与信号交叉口的对比分析提出了无信号交叉口应设置信号灯的临界流量,并提出了设置信号灯的综合建议。

This paper describes simulation models for unsignalized intersections.The number of conflicts and vehicle delays have been used to evaluate the level of service of unsignalized intersections,in which the number of conflicts is used to evaluate the safety effects and delay is used in cost benifit analysis.A formula for calculating the number of conflicts at unsignalized intersections has been derived and is compared with the simulation models.It is concluded that the formula could be used for unsignalized intersections.At the end of this paper,several conc-lusions are drawn and suggestions are proposed for establishing signal control on unsignalized intersections.