| 基于排队状态的单点交叉口动态信号配时算法 |
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| 引用本文： | 李明利, 赵祥模, 张利川. 基于排队状态的单点交叉口动态信号配时算法[J]. 交通运输工程学报, 2008, 8(5): 100-103. |
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| 作者姓名： | 李明利 赵祥模 张利川 |
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| 作者单位： | 长安大学 信息工程学院, 陕西 西安 710064 |
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| 基金项目： | 教育部跨世纪优秀人才培养计划，江西省交通科技项目 |
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| 摘 要： | 以绿灯末尾排队状态为目标, 研究了二相位控制单点交叉口的动态信号配时。根据排队形成和消散过程建立了排队模型, 分析了信号周期、绿信比和到达率对排队状态的影响。以两相位排队均处在弱欠饱和状态为控制目标, 提出了随到达率变化的简便信号配时算法, 根据总流量比计算信号周期, 根据较大的流量比调节主相位绿信比。仿真结果表明: 信号周期缓慢地同向改变两相排队状态, 绿信比反向改变两相排队状态, 到达率仅改变相应相位的排队状态。当交叉口饱和流率为0.50 pcu·s-1, 黄灯和绿灯前损时间为4 s, 到达率在0.10~0.26 pcu·s-1之间变化时, 两相排队始终都在弱欠饱和状态, 说明配时算法是有效的。
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| 关 键 词： | 交通信息控制 二相位单点交叉口 排队状态 信号配时算法 到达率 信号周期 绿信比 |
| 收稿时间： | 2008-03-21 |
Dynamic signal timing algorithm at single-point intersection based on queuing condition |
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| LI Ming-li, ZHAO Xiang-mo, ZHANG Li-chuan. Dynamic signal timing algorithm at single-point intersection based on queuing condition[J]. Journal of Traffic and Transportation Engineering, 2008, 8(5): 100-103. |
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| Authors: | LI Ming-li ZHAO Xiang-mo ZHANG Li-chuan |
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| Affiliation: | School of Information Engineering, Chang'an University, Xi'an 710064, Shaanxi, China |
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| Abstract: | The queuing states in the green end were taken as objective, the dynamic signal timing at single-point intersection under the control of two-phase signal was studied, a queuing model was built according to the queuing and discharging process, and the effects of signal cycle, split and arrival ratio on the queuing states were analysed.A signal timing simple algorithm following the fluctuation of arrival ratio was put forward when two phases were in little under-saturation queuing states, the cycle was calculated according to the total ratio of flow volume, and the split of main phase was adjusted depending on the higher ratio of flow volume.Simulation result indicates that the cycle slowly changes both phases queuing conditions in the same direction, the split changes them in the reverse direction, and the arrival ratio only alters the queuing conditions of corresponding phases.When saturation flow rates are 0.50 pcu·s-1, the times of yellow and green former losses are 4 s, and the arrival ratio varies from 0.10 to 0.26 pcu·s-1, two phases are in little under-saturation queuing states, so the algorithm is effective. |
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| Keywords: | traffic information control two-phase single-point intersection queuing condition signal timing algorithm arrival ratio signal cycle split |
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