Department of Civil Engineering, Middle East Technical University, Ankara, Turkey. Corresponding author: Oruc Altintasi (email: oruc.altintasi@ikcu.edu.tr). †Current affiliation: Department of Civil Engineering, Transportation Division, Izmir Katip Celebi University, Izmir, Turkey. Copyright remains with the author(s) or their institution(s). Permission for reuse (free in most cases) can be obtained from RightsLink. Received July 3, 2018. Accepted April 19, 2019.