快速路匝道出口衔接路段信号配时优化研究  

Research on Optimizing Signal Timing of Expressway Ramp Exit Connecting Section

作　　者：梁春岩[1] 曲梓宁 田秀娟 秦雪 LIANG Chun-yan;QU Zi-ning;TIAN Xiu-juan;QIN Xue

机构地区：[1]吉林建筑大学交通科学与工程学院,吉林长春130118

出　　处：《内蒙古公路与运输》2021年第5期55-58,共4页Highways & Transportation in Inner Mongolia

基　　金：吉林省教育厅“十三五”科学技术项目(JJKH20200285KJ)。

摘　　要：根据快速路匝道出口交织区交通流特性,将交通流划分为五个状态,利用模糊均值聚类(FCM)方法,以流量和占有率作为特征属性得到不同时段交通状态,以此作为启动信号控制的阈值,建立信号配时优化算法。文章以长春市快速路匝道出口交织区实际数据为基础,对信号配时优化方法进行验证。结果表明:高峰期间交织区交通状态明显提升,延误和冲突有明显下降,拥堵状态得到有效改善。According to the characteristics of the traffic flow in the interweaving zone at the exit of the expressway ramp,the traffic flow was divided into five states.The fuzzy mean clustering(FCM)method was used to obtain traffic status in different periods with the flow and occupancy as the characteristic attributes,which were used as the threshold value of the starting signal control to establish the signal timing optimization algorithm.Based on the actual data of the interweaving area connected by the ramp exit of a representative expressway in Changchun,the signal timing optimization method was verified.The results show that the traffic state in the interweaving area during peak hours is significantly improved,delays and conflicts are significantly reduced,and congestion is effectively improved.

关 键 词：匝道出口 信号配时优化 占有率 流量 模糊均值聚类 

分 类 号：U121[交通运输工程]