采用GPS探测车的城市交通流分析

Urban Traffic Flow Analysis Using GPS Vehicle Probe

城市交通流状态的分析是实现智能交通系统的关键技术之一。本文介绍了一个采用GPS探测车,同时结合交通用地理信息系统(GIS-T)进行城市交通流分析的实时系统。该系统主要由坐标转换、地图匹配和建模拟合三个模块组成。通过对探测车数据的处理,得到了道路上的速度分布,并最终实现了一个近由2000条道路所构成的城市道路网络的交通流分析。

The detection and analysis of urban traffic is o ne of the key technologies in the realization of the IntelligentTransportation System This paper presents a real-time system of estimating urban traffic flow through the GPS vehicle probe.The system consists of three modules: coordinates transformation module, map matching module, modeling and fitting module.The road velocity distribution is obtained by processing the data from the vehicle probe, realizing the estimation of urban trafficflow for a nearly-200-road traffic net.