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基于机动车延误的Hook-turn交叉口信号控制方案优化方法

, PP. 94-101

Keywords: 交通工程,信号控制,优化模型,左转机动车组织,机动车延误

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Abstract:

?为了给Hook-turn交叉口信号配时方案设置提供理论依据,建立了交叉口直行专用车道的机动车延误计算方法;之后考虑交叉口内部待行区左转机动车发生排队上溯、未发生排队上溯2种情况,建立了直行/左转/右转共用车道的机动车期望延误模型;研究了待行区左转机动车对同相位交通流运行的影响,提出了有效利用绿灯时间的校正方法.以交叉口机动车平均延误最小为目标,以周期时长、相位绿灯时间为自变量,建立信号配时方案优化方法.采用实际交叉口数据对所建立方法进行检验,并根据Hook-turn方法设计了2种改进渠化方案;在VISSIM中采集2种改进方案、现状方案的机动车延误指标,并进行对比分析.结果表明:在优化信号配时方案下,Hook-turn方法可以减少直行机动车以及交叉口整体机动车平均延误;当左转车流量较小时,Hook-turn方法的效益显著.

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