1. Master Candidate, Key Laboratory of Road and Traffic Engineering of Ministry of Education, Tongji Univ., Shanghai 200092, P.R. China.
2. Professor, Key Laboratory of Road and Traffic Engineering of Ministry of Education, Tongji Univ., Shanghai 200092, P.R. China (corresponding author).
3. Professor, Key Laboratory of Road and Traffic Engineering of Ministry of Education, Tongji Univ., Shanghai 200092, P.R. China.
4. Senior Engineer, Key Laboratory of Road and Traffic Engineering of Ministry of Education, Tongji Univ., Shanghai 200092, P.R. China.
5. Master of Engineering, Shanghai Pudong Architectural Design and Research Institute Co., Ltd., No. 1149, Pujian Rd., Pudong New Area, Shanghai 201204, P.R. China.
6. Master of Engineering, Broadvision Engineering Consultants, National Engineering Laboratory for Land Transport Meteorological Disaster Control Technology, No. 9, Shuangfeng Rd., Guandu District, Kunming 650041, P.R. China.
7. Senior Engineer, Dept. of Engineering, Luliang Branch of Shanxi Provincial Highway Bureau, No. 11 South Main St., Luliang 033000, P.R. China.