1. Ph.D. Candidate, Civil and Environmental Engineering and Construction, Univ. of Nevada, Las Vegas, 4505 Maryland Pkwy., P.O. Box 454007, Las Vegas, NV 89154-4007.
2. Associate Professor, Director, Transportation Research Center, Civil and Environmental Engineering and Construction, Univ. of Nevada, Las Vegas, 4505 Maryland Pkwy., P.O. Box 454007, Las Vegas, NV 89154-4007 (corresponding author).