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短连线信号交叉口的元胞自动机模型

Keywords: 交通工程,交通流特性,模拟,元胞自动机,短连线交叉口,相位差,信号周期

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Abstract:

提出了短连线交叉口元胞自动机交通流模型.采用开放性边界条件,模拟了短连线交叉口的交通流.研究了交通信号灯控制下短连线交叉口的交通流特性.分析了相位差、连线长度、信号周期、产生概率、消失概率对交通流的影响.结果表明相对于长连线交叉口来说,短连线交叉口交通流量不仅决定于上游交叉口的通行能力,而且与连线长度、信号周期和相位差相关;连线长度确定时,存在使主干道和支线交通流量达到最大的最佳相位差;随着连线长度的增大,相位差对主干道和支线交通流的影响逐渐减弱;在最佳相位差时,信号周期长度对交通流量无明显影响.

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