考虑最短周期配时的单点交叉口时段划分方法  

Time-of-day Signal Pan Division Method of Isolated Intersection Considering Shortest Signal Cycle

作　　者：虞春滨 罗宗胤 黄寒松 YU Chunbin;LUO Zongyin;HUANG Hansong(Suzhou Industrial Park Surveying,Maping and Geoinformation Co.Ltd.,Suzhou 215000,China)

机构地区：[1]苏州工业园区测绘地理信息有限公司,苏州215000

出　　处：《武汉理工大学学报（交通科学与工程版）》2023年第5期834-838,844,共6页Journal of Wuhan University of Technology（Transportation Science & Engineering）

摘　　要：文中提出了一种单点交叉口时段划分方法.建立了一种改进的最短周期配时方法,并通过交叉口的流量数据获得全天每15 min的配时方案.构建了包含空放损失和切换方案损失的总损失函数.通过SOM聚类后再次求解在总损失函数约束下的最优全天时段划分方案.以实际算例分析了该配时方案的可行性以及总损失函数参数的灵敏度.结果表明:该方法获得的时段划分可以较好地刻画流量变化趋势,降低由于配时方案不合理以及频繁切换方案造成的损失,从而提高单点交叉口的通行效率;不同参数的设置可以实现某些定制化需求,为智能信号配时优化提供一个可行的方向.A time division method of single intersection was proposed.An improved shortest cycle timing method was established,and the timing scheme of every 15 minutes in the whole day was obtained through the traffic data of the intersection.The total loss function was constructed,including air release loss and switching scheme loss.After SOM clustering,the optimal all-day time division scheme under the constraint of total loss function was solved again.The feasibility of the timing scheme and the sensitivity of the total loss function parameters were analyzed by a practical example.The results show that the time division obtained by this method can better describe the changing trend of traffic,reduce the loss caused by unreasonable timing scheme and frequent switching scheme,and thus improve the traffic efficiency of single intersection.The setting of different parameters can meet some customization requirements and provide a feasible direction for intelligent signal timing optimization.

关 键 词：时段划分 最短周期 SOM聚类 损失函数 

分 类 号：U491[交通运输工程—交通运输规划与管理]