1. School of Systems Science, Beijing Jiaotong University, Beijing, People’s Republic of China
2. Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong, People’s Republic of China
3. Department of Construction and Quality Management, School of Science and Technology, Hong Kong Metropolitan University, Hong Kong, People’s Republic of China
4. South Ural College, Zhengzhou University of Aeronautics, Henan, People’s Republic of China
5. School of Traffic and Transportation, Beijing Jiaotong University, Beijing, People’s Republic of China