[1] Beijing Key Laboratory of Traffic Engineering, College of Metropolitan Transportation, Beijing University of Technology, No.100, Pingleyuan, Chaoyang, Beijing,100124, China
[2] School of Civil Engineering and Transportation, Beijing University of Civil Engineering and Architecture, No 1, Zhanlanguan Rd., Xicheng District, Beijing,100044, China
[3] Department of Civil and Environmental Engineering, Michigan Technological University, 1400 Townsend Drive, Houghton,MI,49931-1295, United States