An Improved Method for Estimating Urban Traffic State via Probe Vehicle Tracking

作     者：ZHAO Qiankun~1,KONG Qingjie~1,XIA Yingjie~(1,2),LIU Yuncai~1 1.Department of Automation,Shanghai Jiao Tong University,and Key Laboratory of System Control and Information Processing,Ministry of Education of China,Shanghai,200240,P.R.China 2.Hangzhou Institute of Service Engineering,Hangzhou Normal University,Hangzhou,310012,P.R.China 

会议名称：《第三十届中国控制会议》

会议日期：2011年

学科分类：081203[工学-计算机应用技术] 08[工学] 080401[工学-精密仪器及机械] 081105[工学-导航、制导与控制] 0804[工学-仪器科学与技术] 0835[工学-软件工程] 0825[工学-航空宇航科学与技术] 0811[工学-控制科学与工程] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

基　　金：supported in part by National Natural Science Foundation(NNSF)of China under Grant 61002009 China Postdoctoral Science Foundation under Grant 20100480596 

关 键 词：GPS probe vehicle Traffic state estimation Vehicle tracking Intelligent Transportation Systems 

摘      要：正In order to estimate the state of urban traffic flow,a Probe-Vehicle-Tracking based method is proposed in this paper. The method collects traffic flow data with Global Positioning System（GPS）-equipped taxies,which are taken as the probe ***,the A* heuristic search algorithm is employed to judge the optimal vehicle tracking *** addition,the average velocities of road links are calculated by considering the velocities of vehicle tracks as well as their corresponding credibility ***,an experiment with massive real-world traffic data in the surface road network of Shanghai was carried out,and the ground truth of the average velocity was obtained by repeating the videos shot on the 24 links in Shanghai *** experiment results verify that the method has high accuracy and can be applied in engineering practice.