1. Transportation Environmental Research Department, New Transportation Innovative Research Center, Korea Railroad Research Institute, 176 Cheoldobangmulgwan-ro, Uiwang-si 16105, Gyeonggi-do, Republic of Korea
2. Transportation System Engineering, University of Science Technology, 176 Cheoldobangmulgwan-ro, Uiwang-si 16105, Gyeonggi-do, Republic of Korea