信号交叉口行人自行车交通强度状态划分研究  

Division Method of the Intensity State of the Pedestrians and Bicycles in the Signalized Intersection Crosswalks of Green Time

作　　者：刘金广[1] 于泉[1] 荣建[1] 刘小明[1,2] 刘培华[1] 张会[1] 

机构地区：[1]北京工业大学交通工程北京市重点实验室,北京100124 [2]北京市交通委员会,北京100053

出　　处：《武汉理工大学学报（交通科学与工程版）》2009年第5期932-935,共4页Journal of Wuhan University of Technology（Transportation Science & Engineering）

基　　金：国家"十一五"科技支撑计划重点项目(批准号:2006BAJ18B03);北京新城(怀柔)智能交通管理示范工程项目(批准号:Z07050601800701);北京市教委科技创新平台资助项目(批准号:102KB00776)资助

摘　　要：混合交通是造成交叉口拥堵和交通事故的重要原因之一.为了便于有效的研究交叉口混合交通信号控制策略及交叉口交通仿真,提出了信号交叉口人行横道绿灯时间行人自行车交通强度状态划分方法.分析了交叉口人行横道绿灯放行的交通特性,定义了人行横道绿灯放行时刻行人自行车聚集群的概念.从信号交叉口人行横道的"时空资源"利用角度,提出了划分人行横道绿灯时间行人自行车交通强度状态概念及必要性,选取了行人自行车绿灯时间通过流率、绿灯时间利用率以及行人自行车绿灯时间的空间占有率三个指标作为强度划分依据,选取K均值聚类为强度状态划分方法,对人行横道绿灯时刻行人自行车交通强度状态划分为三类,分别为低强度、中等强度和高强度.结合北京市平乐园交叉口为例,进行了行人自行车交通强度状态划分.Mixed traffic phenomena are one of the most remarkable characteristics in China cities, which can cause traffic congestion and accident in urban intersection in China. So as to create the appropriate strategy of signal control of the intersection, this paper presents a new method to divide the intensity state of the pedestrians and bicycles in the signalized intersection crosswalks of green time. First, it analyzes the characteristics of the pedestrians and bicycles in the intersection crosswalks of green time, and presents the new definition of the pedestrians and bicycles conglomeration. Then, in the view of the timing and spacing resources of the intersection, it presents the new definition and the necessary of the division of the intensity state of the pedestrians and bicycles in the signalized intersection crosswalks of green time. We choose three indexes as the criterion to divide the intensity state of the pedestrians and bicycles as follows： the volume of the pedestrians and bicycles under the green time; the utilization proportion of the green time; and the utilization proportion of the space of the intersection. We choose the K--means cluster analysis as the method to divide the intensity state into three categories as follows： low intensity state; mean intensity state and high intensity state. Finally, it takes the Pingleyuan intersection of Beijing for example to divide the intensity state of the pedestrians and bicycles.

关 键 词：混合交通 信号交叉口 强度状态 聚类分析 

分 类 号：U491.23[交通运输工程—交通运输规划与管理]