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短右转车道影响下的信号交叉口的直行通行能力

, PP. 131-135

Keywords: 交通工程,导流岛,通行能力模型,阻挡概率,直行车道

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Abstract:

为量化短右转车道对直行通行能力的影响,针对设置导流岛的信号交叉口短右转车道导致车辆排队阻挡,从而造成直行车道通行能力下降的问题,应用概率论与数理统计方法,考虑短右转车道长度、行人和自行车到达规律、右转车辆到达规律等交通流特性,将与右转车道相邻的直行车道车辆受阻挡情况分为被不能进入短右转车道的车辆阻挡、被右转溢出车辆阻挡、不阻挡3种情况,建立了短右转车道影响下的直行车道通行能力分析模型。通过实测数据对模型进行参数标定,采用实测数据及VISSIM仿真值验证该模型。结果表明,模型计算值与仿真值均随着右转车道长度的增加而增大;计算值总体比HCM方法计算值偏低;随着右转车道长度的增加,模型计算值接近HCM方法计算值。

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