1. College of Civil Engineering and Architecture, Zhejiang University, Hangzhou, P. R. People’s Republic of China
2. School of Civil and Transportation Engineering, Beijing University of Civil Engineering and Architecture, Beijing, P. R. People’s Republic of China
3. Hebei Provincial Communications Planning and Design Institute, Shijiazhuang, P. R. People’s Republic of China
4. Anhui Transportation Holding Group Co., Ltd., Hefei, P. R. People’s Republic of China