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交叉口直行待行区设置研究

Keywords: 交通工程,理论模型,HCM2000延误法,待行区,通行能力,延误

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Abstract:

在交叉路口极其复杂的交通流运行状态的情形下,结合待行区设置的基本条件,深入研究有无直行待行区通行能力模型和延误模型的异同。分析了设置直行待行区前后绿灯间隔时间和有效绿灯时间等信号控制参数变化的情况,并精确运用数学公式推导出通行能力的增加值以及延误时间的减少值。最后结合实例交叉口,并通过仿真进行交通运行效率分析,结果表明一般在流量比或饱和度比较大的情况下设置直行待行区,充分利用路口的空间闲置区域部分,提高直行车道的利用率,最大限度达到时间和空间的相互转换的目的,从而不仅提高直行车道的通行能力,降低车均延误时间,而且还在一定程度上提高交叉口的通行能力,减少了整个路口的延误,验证了模型的正确性和适用性。

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