1. Research Centre for Integrated Transport Innovation, School of Civil and Environmental Engineering, University of New South Wales, Sydney, Australia
2. School of Computer Science and Engineering, University of New South Wales, Sydney, Australia
3. School of Economics and Management, Beihang University, Beijing, People's Republic of China
4. Department of Industrial and Manufacturing Systems Engineering, University of Hong Kong, Hong Kong, People's Republic of China
5. Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Kowloon, Hong Kong, People's Republic of China