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高速公路改扩建后区域路网交通分流模型

, PP. 73-76

Keywords: 交通工程,系统最优,数学模型,交通分流,高速公路改扩建

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Abstract:

为量化分析高速公路改扩建分流后区域路网的拥挤程度和服务水平,充分考虑路网分流条件,以系统饱和度为约束条件,以区域路网内分流系统最优为目标,建立了具有实时反馈效用的高速公路改扩建交通分流机制和分配模型。以陕西潼关至宝鸡高速公路改扩建作业项目为例,应用新建模型对2种交通分流方案进行了对比。研究结果表明该模型考虑分流路段的交通量分担能力,以分流后路段交通量和路段通行能力之比作为权重系数,来反映分流后区域路网的交通拥挤状况,能够实现区域路网内交通分流的系统最优,达到配流均衡。通过应用该方法对大型车分流和小汽车分流两套方案进行的对比分析,表明大型车辆分流方案的路段饱和度优于小汽车分流方案。

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