1. Research Assistant, School of Civil Engineering, Purdue Univ., 550 Stadium Mall Dr., W. Lafayette, IN 47907 (corresponding author).
2. Research Assistant, School of Civil Engineering, Purdue Univ., 550 Stadium Mall Dr., W. Lafayette, IN 47907.
3. Assistant Professor, School of Civil Engineering, Purdue Univ., 550 Stadium Mall Dr., W. Lafayette IN 47907.
4. Engineer, Indiana Dept. of Transportation 100N Senate Ave., Room IGCN 755, Indianapolis, IN 46204.