School of.Transpfrtation anfl Logistics;
S outhwestJiaotong University;
Chengclu 610031;
China;
China Railway Corporation;
Beijing 100844. China;
National United Engineering Laboratory of Integrated and Intelligent Transportation;
SouthwestJiaotong University;
Chengdu 610031. China;
Depamnent of Civil and Environmental Engineering;
University of Waterloo. Waterloo N2L 3G I;
Canada;