1. Professor and Chairman, Dept. of Civil and Environmental Engineering, Rutgers Univ., 623 Bowser Road, Piscataway, NJ 08854 (corresponding author).
2. Research Engineer, Intelligent Vision and Reasoning Dept., Siemens Corporate Research, 755 College Road East, Princeton, NJ 08540.
3. Research Staff, Thomson Corporate Research, 2 Independence Way, Princeton, NJ 08540.
4. Program Manager, Intelligent Vision and Reasoning Dept., Siemens Corporate Research, 755 College Road East, Princeton, NJ 08540.
5. Director, Center for Advanced Infrastructure and Transportation (CAIT), Rutgers Univ., 100 Brett Road, Piscataway, NJ 08854.