School of Traffic &Transportation Engineering Central South University Changsha China;
Department of System Engineering and Engineering Management The City University of Hong Kong Hong Kong China;
School of Traffic &Transportation Engineering Central South University Changsha China;
Department of Psychology College of Arts and Sciences University of Alabama at Birmingham Birmingham AL USA;
Department of System Engineering and Engineering Management The City University of Hong Kong Hong Kong China;
Department of Epidemiology and Health Statistics Xiangya School of Public Health Central South University Changsha 410078 China;