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高速公路施工区限速标志位置确定方法

, PP. 91-98

Keywords: 交通安全,高速公路施工区,限速标志,视认分析,前置距离,后置距离

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Abstract:

根据驾驶人的视认性和短时记忆理论,分析了限速标志影响下的驾驶人自适应性和车辆的易操控性,计算了高速公路施工区内限速标志的前置、后置和重复距离。基于高速公路施工区长度划分计算模型,考虑了车辆排队长度、驾驶人短时记忆以及重复距离等因素,提出了高速公路施工区限速标志位置确定方法,并运用VISSIM仿真软件进行实例验证。仿真结果表明在最低限速为40km?h-1、大车混入率为40%条件下,当交通量为1400pcu?h-1时,一、二、三级限速标志的最小冲突率分别为0.06、0.10、0.21次?m-1,最大冲突率分别为0.56、0.14、0.23次?m-1;当交通量为1960pcu?h-1时,三级限速标志的最小冲突率分别为0.84、0.28、0.36次?m-1,最大冲突率分别为0.87、0.31、0.40次?m-1;当交通量为2240pcu?h-1时,三级限速标志的最小冲突率分别为0.72、0.31、0.39次?m-1,最大冲突率分别为0.74、0.34、0.48次?m-1。

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