1. Department of Geography, University of Cambridge, Cambridge, UK
2. Tyndall Centre for Climate Change Research, University of East Anglia, Norwich, UK
3. MOE Key Laboratory for Transportation Complex Systems Theory and Technology, Beijing Jiaotong University, Beijing, People’s Republic of China
4. Key Laboratory of Transport Industry of Big Data Application Technologies for Comprehensive Transport, Beijing Jiaotong University, Beijing, People’s Republic of China