摘要
为降低线控系统交通延误,通过车流集散性分析,根据交通波理论,提出协调相位红绿灯车流到达模型。在此基础上,考虑绿波交通构成和聚集车队通行需求,依据绿波车流时空图,探讨上下游交叉口的协调相位绿灯时间算法。进而结合次要道路交通需求,给出线控系统的系统周期和绿灯时间优化模型。最后以某干道为实例,进行成果试算及验证。验证结果表明:相比现状,优化后实例干道延误下降了82.57 s/pcu,主次路系统延误下降了104.64 s/pcu;相比基于经典数解法的绿波方案,优化后实例干道延误下降了18.24 s/pcu,主次路系统延误下降了5.16 s/pcu。可见该方法可改善线控系统配时算法,有助于城市交通控制优化。
To reduce the traffic delay of the artery traffic signal control system,by analyzing traffic aggregation and dispersion,the traffic wave theory was used to propose traffic arrival models in the green and red time of the coordinated phase.Based on the above,considering the traffic composition of green wave system and travel demand of aggregating vehicle platoon,the traffic spatial and temporal diagram of the green wave system was used to investigate the algorithm for the green duration in the coordinated phase of upstream and downstream intersections.After that,according to the travel demand of minor streets,the optimization models for the system cycle and green time of the artery traffic signal control system were proposed.Finally,one arterial was taken as an example of trial calculation and verification.Verification results show that compared with the current situation,the improved example arterial’s delay decreases by 82.57 s/pcu,and major-minor street system’s delay decreases by 104.64 s/pcu.Meanwhile,compared with the green wave scheme calculated by the classical algebraic algorithm,the improved scheme provides results that the example arterial’s delay decreases by 18.24 s/pcu,and the street system’s delay decreases by 5.16 s/pcu.It can be seen that the method could improve the signal timing algorithm of the artery traffic signal control system,so it is beneficial for optimizing urban traffic control.
作者
卓曦
郑伟凡
吴秋花
张永强
傅丽碧
ZHUO Xi;ZHENG Weifan;WU Qiuhua;ZHANG Yongqiang;FU Libi(College of Civil Engineering,Fuzhou University,Fuzhou 350108,China;College of Automobile and Transport Engineering,Nanjing Forestry University,Nanjing 210037,China)
出处
《贵州大学学报（自然科学版）》
2021年第1期85-90,97,共7页
Journal of Guizhou University:Natural Sciences
基金
国家自然科学基金资助项目(71804026)。
关键词
交通工程
绿灯时间
集散性
线控系统
交通波理论
traffic engineering
green time
aggregation and dispersion
artery traffic signal control system
traffic wave theory
