1. Associate Professor, Dept. of Civil Engineering, North Carolina A&T State Univ., 434 McNair Hall, 1601 E. Market St., Greensboro, NC 27411 (corresponding author).
2. Research Scholar and Ph.D. Candidate, Dept. of Civil and Environmental Engineering, Amirkabir Univ. of Technology (Tehran Polytechnic), 193954598 Tehran, Iran.
3. Director, Research and Development Division, Pasargad Oil Company, Tondgouyan Highway, Rajaei Shahr, 158754413 Tehran, Iran.
4. Associate Professor and Head of Transportation Group, Dept. of Civil and Environmental Engineering, Amirkabir Univ. of Technology (Tehran Polytechnic), 158754413 Tehran, Iran.