1. Technische Universität Braunschweig, Department of Civil Engineering (ISBS), Braunschweig, 38106, Germany.
2. Korea Expressway Corporation, Research Institute, Corporate Strategy and Policy Research Division, 23F, 77, Hyeoksin 8-ro, Gimcheon-si, Gyeongsangbuk-do, 740-220, South Korea.
3. Korea Expressway Corporation, Research Institute, Pavement Research Division 50-5, Sancheok-ri, Dongtan-myeon, Hwaseong-si, Gyeonggi-do, 445-812, South Korea.