1. School of Information and Engineering, Chang’an University, Xi’an, China
2. James Watt School of Engineering, University of Glasgow, Glasgow, U.K.
3. Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong, China
4. Department of Civil and Environmental Engineering, Imperial College London, London, U.K.
5. School of Traffic and Transportation Engineering, Central South University, Changsha, China