1. Assistant Professor, Civil Engineering Dept., Middle East Technical Univ., ODTU, Ankara 06531, Turkey (corresponding author).
2. Professional Associate, Parsons Brinckerhoff Quade and Douglas, Inc., One Penn Plaza, New York, NY 10119.
3. Vice President, Parsons Brinckerhoff Quade and Douglas, One Penn Plaza, New York, NY 10119.