1. Research Assistant, Dept. of Civil Engineering, Stony Brook Univ., 1208 Computer Science, Stony Brook, NY 11794 (corresponding author).
2. Assistant Professor, Dept. of Civil Engineering, Stony Brook Univ., 2425 Computer Science, Stony Brook, NY 11794.
3. Research Associate, Region-2 University Transportation Research Center, City College of New York, Marshak Hall-Science Bldg., Suite 910, 138th St. and Convent Ave., New York, NY 10031.
4. Associate Professor and Director, Region-2 University Transportation Research Center, City College of New York, Marshak Hall-Science Bldg., Suite 910, 138th St. and Convent Ave., New York, NY 10031.