1. Department of Civil and Environmental Engineering; University of Massachusetts; Amherst MA USA
2. Beijing Key Laboratory of Traffic Engineering, College of Metropolitan Transportation; Beijing University of Technology; Beijing China
3. Beijing Key Laboratory of Performance Guarantee on Urban Rail Transit Vehicles, School of Mechanical-Electronic and Vehicle Engineering; Beijing University of Civil Engineering and Architecture; Beijing China
4. Department of Civil Engineering; Southwest Jiaotong University; Chengdu China
5. School of Civil and Environmental Engineering; Oklahoma State University; Stillwater OK USA