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Apr 26, 2012
Performance Comparison of GPS Probe-Vehicle-Based Methods in Urban Traffic State Estimation
Authors: Qian-kun Zhao, Qing-jie Kong [email protected], Ying-jie Xia, and Yun-cai LiuAuthor Affiliations
Publication: ICTIS 2011: Multimodal Approach to Sustained Transportation System Development: Information, Technology, Implementation
Abstract
Global Positioning System (GPS)-equipped probe vehicles have been one of the principal techniques in detection of traffic flow. In order to guide the application of the different methods using data from GPS probe vehicles, this paper compares two of the most popular methods using the GPS data to estimate traffic state- the method of tracking probe vehicles, and the one of fitting the model with the sample points of probe vehicles. In the experiment, data from thousands of GPS-equipped taxies were taken as the probe vehicles, and the estimate accuracy and operation speed of the two different methods were systematically measured. For the accuracy experiment, the ground truth was obtained by replaying the videos which were shot on 24 links in Shanghai downtown. The experiment results illustrate that the tracking-based method usually bears higher estimate accuracy, and slower operation speed, compared to the model-fitting method.
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© 2011 American Society of Civil Engineers.
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Published online: Apr 26, 2012
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Qian-kun Zhao
Department of Automation, Shanghai Jiao Tong University, and Key Laboratory of System Control and Information Processing, Ministry of Education of China, 800 Dong Chuan Road, Shanghai, 200240, China
Department of Automation, Shanghai Jiao Tong University, and Key Laboratory of System Control and Information Processing, Ministry of Education of China, 800 Dong Chuan Road, Shanghai, 200240, China.E-mail: [email protected]
Ying-jie Xia
Department of Automation, Shanghai Jiao Tong University, and Key Laboratory of System Control and Information Processing, Ministry of Education of China, 800 Dong Chuan Road, Shanghai, 200240, China; and Hangzhou Institute of Service Engineering, Hangzhou Normal University, Hangzhou, 310012, China
Yun-cai Liu
Department of Automation, Shanghai Jiao Tong University, and Key Laboratory of System Control and Information Processing, Ministry of Education of China, 800 Dong Chuan Road, Shanghai, 200240, China
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