基于出租车跟踪的市区路网交通状态估计方法  

A Taxi-Tracking-based Method for Traffic Status Estimation of Urban Road-Network

作　　者：史文欢[1] 孔庆杰[1] 刘允才[1] 

机构地区：[1]上海交通大学图像处理与模式识别研究所,上海200240

出　　处：《交通信息与安全》2009年第5期29-32,共4页Journal of Transport Information and Safety

基　　金：国家"十一五"科技支撑计划项目(批准号:2006BAJ18B02)资助

摘　　要：为了获取市区路网的交通状态,提出了一种基于出租车跟踪的市区路网交通状态估计方法。该方法采用GPS定位设备获取出租车的行驶数据,然后结合数字地图数据对其中的位置数据进行修正,并采用A*启发式搜索算法对出租车进行跟踪,最终通过计算出租车跟踪路径在所覆盖路段上的置信参数来实现对市区路网交通状态的估计。基于上海市的出租车GPS调度数据和市区路网数字地图数据的应用实例验证了这一方法的可用性。In order to acquire traffic status of urban road network, a taxi-tracking-based method is presented. As taxis travel on the urban road network, their traveling data are collected with GPS （Global Positioning System） devices, and then corrected hy using the urban road network map data. Each taxi is tracked according to its amended traveling data by using the A＊ heuristic search algorithm and traffic status of urban road network is estimated based on the calculation of confidence intervals of traffic parameters for road segments with tracking trajectory data. A case study conducted with taxi GPS data and digital map of the urban road network in Shanghai proves that the proposed method is practical.

关 键 词：GPS 出租车跟踪 交通状态估计 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]