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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 introduces a computer simulation model of a signalless intersection. Based on the analysis of traffic flow characteristics at no signalized intersection, it is suggested that the number of conflicts and delay be used as service level evaluation indicators for no-signal intersection, in which the number of conflicts is used to reflect the safety of vehicle driving at the intersection and the delay is analyzed as economic benefit index. The paper also deduces the formula for calculating the number of collisions at a signalless intersection and compares it with the simulation to prove that it can be used in a signalless intersection. At the end of this paper, we compare the non-signalized intersections with signalized intersections and put forward the critical traffic signals that should be set up at no-signalized intersections. Finally, a comprehensive proposal of setting signal lights is proposed.