1. Postdoctoral Research Fellow, School of Civil Engineering, Purdue Univ., 550 Stadium Mall Dr., West Lafayette, IN 47907 (corresponding author).
2. Associate Professor, School of Civil Engineering, Purdue Univ., 550 Stadium Mall Dr., West Lafayette, IN 47907.
3. Transportation Research Section Manager, Indiana Dept. of Transportation, 1205 Montgomery St., West Lafayette, IN 47906.
4. Olson Distinguished Professor, School of Civil Engineering, Purdue Univ., 550 Stadium Mall Dr., West Lafayette, IN 47907.