1. Assistant Professor, Dept. of Civil and Environmental Engineering, Univ. of Illinois at Urbana-Champaign, Newmark Civil Engineering Lab, 205 N. Mathews Ave., Urbana, IL 61801 (corresponding author).
2. Associate Professor and Director, Dept. of Civil Engineering, Center for Information Systems in Infrastructure and Construction, Univ. of Toronto, 35 St. George St., Toronto, ON, Canada M5S 1A4.