一种实时确定城市交通网络流量的方法  

A Method for Measuring Real-Time Traffic Flow on A Urban Transportation Network

作　　者：徐天泽[1] 

机构地区：[1]云南警官学院,昆明650223

出　　处：《交通科技》2004年第6期80-81,84,共3页Transportation Science & Technology

基　　金：云南省自然科学基金项目 ( 2 0 0 2 F0 0 86M)资助

摘　　要：介绍一种基于城市交通控制系统的实时确定交通网络流量及进行动态个人最优交通分配的方法。车流在每一个交叉路口根据其选择的方向被分成子流。定义入口关联矩阵及出口关联矩阵。In the paper, we introduce a method that is based on an actual urban traffic control system to obtain the real-time vehicle flow value on a whole transportation network and to assign traffic flow in a dynamic user optimal way. Vehicle flows are divided into subflows at each exit of an intersection based on the direction they have chosen. By detecting subflows entering or departing intersections at any time interval, which is set small enough and thus approximates real-time, the flow pattern on the whole network can be determined. Current shortest path/s are thus found and transmitted to the drivers that need them. We apply it to a simulated network as an example of how such the method would work.

关 键 词：交叉路口 城市交通网络 城市交通控制系统 车流 交通分配 最优路径 寻找 出口 方向 模式 

分 类 号：U491[交通运输工程—交通运输规划与管理]