1. Assistant Professor, Dept. of Transportation and Logistics Engineering, Hanyang Univ., 55 Hanyangdaehak-ro, Sangnok, Ansan, Gyeonggi-do 15588, South Korea (corresponding author).
2. Professor and Chair, Dept. of Civil, Environmental and Construction Engineering, Univ. of Central Florida, 12800 Pegasus Dr., Suite 211, Orlando, FL 32816.