交通物联网中基于改进Webster方法的单点信号配时研究
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摘要
针对交通物联网中单点定时信号配时问题,将微观层面分析法和宏观层面分析法相结合,提出了一种基于改进Webster方法的配时方案。以饱和度和信控延误为优化目标,建立单点的平均延误模型;针对无信号控制和有信号控制的单交叉口分别建立博弈模型和冲突模型,并进行冲突分析;基于改进Webster方法,额外考虑了机动车通过单点所需最短时间,提出了单点信号配时三步优化方案以减少延误。仿真结果证明了所提方案的有效性。
Aiming at the timing signal problem of single intersection, a timing method based on the improved Webster algorithm in transportation Internet of things was proposed by combining the micro level analysis method with the macro level analysis method. In order to optimize the saturation and signal control delay, the average delay model was established. The game model and the conflict model were established with non-signal control and signal control. And the conflict analysis was carried out to illustrate that the optimal signal timing could coordinate the conflicting traffic flow. Based on the improved Webster algorithm, the shortest time required for the motor vehicle to pass the single intersection was additionally considered and a three-step optimization method for timing method at single intersection was proposed to reduce the traffic delay to ensure that the vehicle could pass effectively. The simulation results illustrate the effectiveness of the proposed solution.
Aiming at the timing signal problem of single intersection, a timing method based on the improved Webster algorithm in transportation Internet of things was proposed by combining the micro level analysis method with the macro level analysis method. In order to optimize the saturation and signal control delay, the average delay model was established. The game model and the conflict model were established with non-signal control and signal control. And the conflict analysis was carried out to illustrate that the optimal signal timing could coordinate the conflicting traffic flow. Based on the improved Webster algorithm, the shortest time required for the motor vehicle to pass the single intersection was additionally considered and a three-step optimization method for timing method at single intersection was proposed to reduce the traffic delay to ensure that the vehicle could pass effectively. The simulation results illustrate the effectiveness of the proposed solution.
引文
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[2]叶剑.智能交通系统架构中物联网技术的应用[J].科技创新与应用,2018(21):175-176.YE J.Application of Internet of things technology in intelligent transportation system architecture[J].Technology Innovation and Application,2018(21):175-176.
[3]MIRHELI A,HAJIBABAI L,HAJBABAIE A.Development of a signal-head-free intersection control logic in a fully connected and autonomous vehicle environment[J].Transportation Research Part C,2018(92):412-425.
[4]周堂.物联网背景下城市交通拥堵事前疏导研究[D].长沙:湖南大学,2014.ZHOU T.Research on urban traffic congestion preventive guidance under the background of Internet of things[D].Changsha:Hunan University,2014.
[5]马庆禄,斯海林,郭建伟.物联网环境下城市交通区域联动的云控制策略[J].计算机应用研究,2013,30(9):2711-2714.MA Q L,SI H L,GUO J W.Cloud computing strategy of coordinated control in urban region traffic things networking[J].Application Research of Computers,2013,30(9):2711-2714.
[6]欧阳红静.物联网与智能交通控制系统[J].科技资讯,2013(20):15-16.OUYANG H J.Internet of things and intelligent transportation control system[J].Science&Technology Information,2013(20):15-16.
[7]LEE J,ABDEL-ATY M,JIANG X.Development of zone system for macro-level traffic safety analysis[J].Journal of Transport Geography,2014(38):13-21.
[8]ALMEIDA J,COSTA C,SILVA F N D.A framework for conflict analysis in spatial planning for tourism[J].Tourism Management Perspectives,2017(24):94-106.
[9]YANG X,ZHAO J,MA W,et al.A survey of research on calculation methods of signal control intersection capacity[J].China Journal of Highways,2014,27(5):148-157.
[10]陈复扬,闫啸岳,姜斌.过饱和状态下道路单交叉口的延误模型建立[J].物联网学报,2017,1(3):40-46.CHEN F Y,YAN X Y,JIANG B.Research on the delay model of single intersection in the oversaturated state[J].Chinese Journal on Internet of Things,2017,1(3):40-46.
[11]WU W.Application of synchro in the teaching of traffic management and control experiment[J].Experimental Technology and Management,2016,33(8):137-140.
[12]CHEN F,WANG L,JIANG B,et al.A novel hybrid petri net model for urban intersection and its application in signal control strategy[J].Journal of the Franklin Institute,2014,351(8):4357-4380.
[13]CHEN F,WANG L,JIANG B,et al.An arterial traffic signal control system based on a novel intersections model and improved hill climbing algorithm[J].Cognitive Computation,2015,7(4):1-13.
[14]YANG Q,ZHAO X,ZHENG L,et al.Signal timing method for roundabout based on model predictive control[J].Journal of Zhejiang University(Engineering Edition),2018,52(1):117-124.
[15]ZHANG L,HUANG X,WU W.Traffic conflict analysis of non-signal intersection[J].Journal of Chongqing Jiaotong University(Natural Science Edition),2015,34(3):105-111.