1. Associate Professor, Dept. of Civil Engineering Sharjah, American Univ. of Sharjah, Sharjah, United Arab Emirates.
2. Transportation Engineer, Parsons Brinkerhoff, 500 Griswold St. #2900 Detroit, MI 48226-5001.
3. Assistant Professor, Dept. of Civil Engineering, American Univ. in Dubai, Dubai, United Arab Emirates (corresponding author).