1. Assoc. Prof., Dept. of Civ. and Envir. Engrg., American Univ. of Beirut, P.O. Box 11-0236, Beirut, Lebanon. E-mail: hadib@aub.edu.lb
2. Assoc. Prof., Dept. of Civ. and Envir. Engrg., American Univ. of Beirut, P.O. Box 11-0236, Beirut, Lebanon. E-mail: mfadel@aub.edu.lb
3. Transp. Engr., Dar Al Handasah (Shair & Partners), P.O. Box 7159, Beirut, Lebanon. E-mail: sshazbak@excite.com
4. MS Candidate, Dept. of Civ. and Envir. Engrg., American Univ. of Beirut, P.O. Box 11-0236, Beirut, Lebanon. E-mail: esaliby@excite.com