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相邻信号交叉口临界协调间距计算方法

Keywords: 信号协调,临界间距,车队离散,效益评价,子区划分

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Abstract:

为了计算相邻两交叉口可以划入同一控制子区的最大临界间距,在进口道停车线前布设线圈检测器获取车流驶离图式;基于罗伯逊车队离散模型,建立了下游交叉口车队到达图式与交叉口间距的关系函数;根据HCM2000中对协调控制效益等级的划分,以下游协调相位每周期绿灯期间到达车辆数占到达总车辆数的40%作为临界条件,分别研究了单向协调与双向协调情况下临界间距指标的动态计算方法,该指标与车队流量、信号配时等动态要素密切相关;最后以算例形式对所建算法的应用情况进行了分析.

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