1. Ph.D. Candidate, School of Civil Engineering, Purdue Univ., West Lafayette, IN 47907-2051 (corresponding author).
2. Professor and Head, Division of Construction Engineering and Management, Purdue Univ., 550 Stadium Mall Dr., West Lafayette, IN 47907.
3. Research Engineer, INDOT Office of Research and Development, 1205 Montgomery St., West Lafayette, IN 47906.