1. Associate Professor, Dept. of Civil and Environmental Engineering, Amirkabir Univ. of Technology, Tehran 15914, Iran.
2. Ph.D. Candidate, Highway Division, Dept. of Civil and Environmental Engineering, Amirkabir Univ. of Technology, Tehran 15914, Iran (corresponding author).
3. M.Sc., Road and Transportation Engineering, Highway Division, Dept. of Civil and Environmental Engineering, Amirkabir Univ. of Technology, Tehran 15914, Iran.