3Manohar B, Mehrdad R, Ishu P, et al. A sensor network system for measuring traffic in short-term construction work zones[C]//Proceedings of the 5th IEEE Intemational Conference on Distributed Computing in Sensor Systems. Heidelberg: Institute of Electrical and Electronics Engineers Inc, 2009: 216-230.
4Meng S, Xie K Q, Ma X J, et al. An on-road wireless sensor network approach for urban traffic state monitoring[C]//llth International IEEE Conference on Intelligent Transportation Systems. Beijing: Peking University Press, 2008:1195-1200.
5Wang Q H. Traffic analysis, modeling and their applications in energy-constrained wireless sensor networks[D]. Sundsvall: Mid Sweden University. Department of Information Technology and Media, 2010: 1-96.
6Cheung S Y, Varaiya P. Traffic surveillance by wireless sensor networks: final report[R]. Berkeley, California: University of California. Institute of Transportation Studies, 2007:1 157.
7Liu H X, He X, Recker W. Estimation of the time-dependency of values of travel time and its reliability from loop detector data[J]. Transportation Research Part B, 2007, 41: 448-461.
8Zhang C Avery R P, Wang Y. Video-based vehicle detection and classification system for real-time traffic data collection using uncalibrated video cameras[J]. Transportation Research Record: Journal of the Transportation Research Board, 2007, 1993: 138-147.
9Balke K, Songchitruksa P, Liu H, et al. Concepts for managing freeway operations during weather events[R]. Texas: Texas Transportation Institute, Texas A&M University. 2006:1-154.
