1. Ph.D. Candidate, Dept. of Civil and Environmental Engineering, Wayne State Univ., 5050 Anthony Wayne Dr., Detroit, MI 48202.
2. Associate Professor, Dept. of Civil Engineering, Transportation Systems Engineering, Indian Institute of Technology Bombay, Powai, Mumbai 400 076, India.
3. Professor, Dept. of Civil and Environmental Engineering, Wayne State Univ., 5050 Anthony Wayne Dr., Detroit, MI 48202.