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一种高速公路隧道交通流元胞自动机模型

, PP. 73-77

Keywords: 交通工程,高速公路隧道,交通瓶颈,元胞自动机,交通流模型

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Abstract:

针对高速公路隧道交通瓶颈,通过分析高速公路隧道区域通行环境特性,研究车辆行驶在高速公路隧道路段时的换车道、加速、减速等微观交通现象,在双车道元胞自动机模型STCA模型基础上,引入车辆速度控制条件和车道控制条件,提出了一种高速公路隧道交通瓶颈元胞自动机模型,分析了不同长度高速公路隧道对区域路段交通流的影响。研究结果表明建立的模型能够模拟车辆在高速公路隧道区域的时空变化特征;高速公路隧道瓶颈会对紧邻瓶颈下游的特定长度路段的交通流产生缓冲作用;隧道路段区域的最大流量以及平均车速与无隧道路段区域相比,将会随着隧道长度的增加而逐渐降低。

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