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�������պ����ѧѧ�� 2011, Vol. 37 Issue (6) :733-737,742    DOI:
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�����, �̽���, �ٽ�, ��С��*
������ҵ��ѧ ��ͨ���̱������ص�ʵ����, ���� 100124
Experimental based traffic flow detectors data accuracy evaluation
Zhai Yaqiao, Weng Jiancheng, Rong Jian, Liu Xiaoming*
Beijing Key Laboratory of Transportation Engineering, Beijing University of Technology, Beijing 100124, China

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Abstract�� Considerable errors exist in the road speed data obtained from various detectors and directly influence the accuracy.Various traffic models were established for estimation. 12 groups of field experiments on different classes- roads by using a test vehicle with global positioning system(GPS) modules were implemented. Through combining automatically recording and manually recording, the accuracy discrepancy of travel speed data collected by floating car system, microwave detectors, and loop detectors was attempted to verify. The results analysis shows that the average error rate of travel speed of floating cars at road section on urban expressways and arteries are 13.6% and 27.8%, and the acquisition data and the actual speed have the same distribution. Microwave detector on expressways and loop detectors on arteries are 30% and 56%. Even though the section velocities of the microwave detector have some errors, which could more or less describe the basic driving conditions. Thus, results provide some evidences for selecting appropriate traffic model decided by accuracy. Moreover, it provides evidences for the application of different dimensions information in multi-source data fusion for higher accuracy.
Keywords�� intelligent transportation system (ITS)   traffic information collection   data accuracy   travel speed   information consistency   data fusion     
Received 2011-01-25;
Fund:

���貿ʮһ��֧�żƻ�������Ŀ(2006BAJ18B03); �Ƽ���ʮһ��֧�żƻ�������Ŀ(2006BAG01A01)

About author: �����(1981-),��,������,��ʿ��,stanleyzhai@139.com.
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�����, �̽���, �ٽ�, ��С��.���е�·��ͨ��������ݾ�������[J]  �������պ����ѧѧ��, 2011,V37(6): 733-737,742
Zhai Yaqiao, Weng Jiancheng, Rong Jian, Liu Xiaoming.Experimental based traffic flow detectors data accuracy evaluation[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2011,V37(6): 733-737,742
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