1. College of Mathematics and Computer Science, Fuzhou University, Fuzhou, China
2. Key Laboratory of Intelligent Metro of Universities in Fujian Province, Fuzhou University, Fuzhou, China
3. Institute for Future Transport and Cities, Coventry University, Coventry, UK
4. Transport Research Centre; School of Mathematical and Physical Sciences, University of Technology Sydney, Sydney, NSW, Australia
5. Faculty of Business, University of Greenwich, London, UK