1. Postdoctoral Researcher, Dept. of Civil and Environmental Engineering and Institute of Transportation Studies, Univ. of California at Davis, Davis, CA 95616.
2. Associate Professor, Dept. of Civil and Environmental Engineering and Institute of Transportation Studies, Univ. of California at Davis, Davis, CA 95616.
3. Professor, Dept. of Civil and Structural Engineering, The Hong Kong Polytechnic Univ., Hung Hom, Kowloon, Hong Kong, People’s Republic of China.