1. Assistant Professor, Amirkabir Univ. of Technology, Hafez Ave., Tehran, Iran; formerly, Ph.D. Candidate, 200 University Ave. West, Waterloo, Ontario, Canada N2L 3G1 (corresponding author).
2. Professor Pavement and Infrastructure Management, Dept. of Civil and Environmental Engineering, Univ. of Waterloo, 200 University Ave. West, Waterloo, Ontario, Canada N2L 3G1.