拥堵条件下的快速路出口匝道交叉口与下游交叉口协同控制方法研究
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摘要
在快速路系统中,出入口匝道是联接快速路与地面道路的纽带,同时也是最易发生拥堵的瓶颈路段。针对快速路出口匝道车辆拥堵问题,建立拥堵条件下的快速路出口匝道交叉口与下游交叉口协同控制模型,由两个子模型组成,分别是目标交叉口通行能力最大优化模型和下游交叉口车辆疏散最大优化模型。前者旨在提高出口匝道的通行能力,后者旨在保障目标交叉口方向来车到达下游交叉口后尽快疏散,案例分析结果表明:在快速路出口匝道拥堵疏解路径中,该模型求得的交叉口信号配时方案比采用Webster配时模型求得的单点信号配时方案在通过车辆数、车均延误以及平均排队长度方面分别优化了18%、22.3%和71.6%,大大加快了出口匝道拥堵疏解效率。
In freeway system,the on-ramp and off-ramp is the link connecting the freeway and ground road,and it's also the bottleneck segment which is most prone to traffic congestion.Targeting to evacuate traffic congestion of offramp in freeway,a collaborative control model combining off-ramp intersection and downstream intersection under congestion conditions was proposed.The proposed model was divided into two parts:the first was the maximum capacity optimization model in targeted intersection and the second was the maximum vehicle evacuation optimization model in downstream intersection.The first model aimed at improving the capacity of the off-ramp,and the second model aimed to guarantee vehicles from the targeted intersections can drive away as soon as possible after reaching downstream intersections.The results of case studies show that:in aspect of route to evacuate traffic congestion on off-ramp of freeway,the intersection signal timing scheme obtained by the proposed model is 18%,22.3% and71.6% better than the single-point signal timing scheme obtained by Webster model in terms of the number of vehicles passing,average delay and average queue length respectively,which significantly improves efficiency of congestion evacuation in off-ramp.
In freeway system,the on-ramp and off-ramp is the link connecting the freeway and ground road,and it's also the bottleneck segment which is most prone to traffic congestion.Targeting to evacuate traffic congestion of offramp in freeway,a collaborative control model combining off-ramp intersection and downstream intersection under congestion conditions was proposed.The proposed model was divided into two parts:the first was the maximum capacity optimization model in targeted intersection and the second was the maximum vehicle evacuation optimization model in downstream intersection.The first model aimed at improving the capacity of the off-ramp,and the second model aimed to guarantee vehicles from the targeted intersections can drive away as soon as possible after reaching downstream intersections.The results of case studies show that:in aspect of route to evacuate traffic congestion on off-ramp of freeway,the intersection signal timing scheme obtained by the proposed model is 18%,22.3% and71.6% better than the single-point signal timing scheme obtained by Webster model in terms of the number of vehicles passing,average delay and average queue length respectively,which significantly improves efficiency of congestion evacuation in off-ramp.
引文
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[4]KOTSIALOS A,PAPAGEORGIOUS M,MIDDELHAM F.Local and optimal coordinated ramp metering for freeway networks[J].Journal of Intelligent Transportation Systems,2005,9(4):187-203.
[5]CASLSON R C,PAPAMICHAIL I,PAPAGEORGIOU M,et al.Optimal motorway traffic flow control involving variable speed limits and ramp metering[J].Transportation Science,2010,44(2):238-253.
[6]王世明.快速路匝道连接段交通信号协同控制关键技术研究[D].广州:华南理工大学,2014.WANG Shiming.Key Technology Research on Traffic Signal Coordination Control of Freeway Segment[D].Guangzhou:South China University of Technology,2014.
[7]朱文铜.城市高架路出口匝道设置及与相邻交叉口协调控制研究[D].成都:西南交通大学,2012.ZHU Wentong.Urban Overhead Road Off-ramp Setting and Control Research and Adjacent Intersection Coordinate[D].Chengdu:Southwest Jiaotong University,2012.
[8]王京元,王炜,庄焰.交叉口行人信号相位配时方法研究[J].武汉理工大学学报(交通科学与工程版),2009,33(1):45-48.WANG Jingyuan,WANG Wei,ZHUANG Yan.Study onmethod for pedestrian signal timing at intersections[J].Journal of Wuhan University of Technology(Transportation Science&Engineering),2009,33(1):45-48.
[9]陈峻,徐良杰,朱顺应,等.交通管理与控制[M].北京:人民交通出版社,2012.CHEN Jun,XU Liangjie,ZHU Shunying,et al.Traffic Management and Control[M].Beijing:China Communications Press,2012.
[10]全永燊.城市交通控制[M].北京:人民交通出版社,1989.QUAN Yongshen.Urban Traffic Control[M].Beijing:China Communications Press,1989.
[11]王力,张立立,李敏,等.考虑延误与通行能力的交叉口信号周期优化[J].重庆交通大学学报(自然科学版),2018,37(4):72-79.WANG Li,ZHANG Lili,LI Min,et al.Intersection signal cycle optimization considering the between delay and traffic capacity[J].Journal of Chongqing Jiaotong University(Natural Science),2018,37(4):72-79.