About the Authors

Kwang-Sub Lee

Roles Conceptualization, Formal analysis, Investigation, Methodology, Software, Visualization, Writing – original draft, Writing – review & editing

leeks33@krri.re.kr

Affiliation Railroad Policy Research Department, Korea Railroad Research Institute, Uiwang-Si, Korea

Jin Ki Eom

Roles Data curation, Funding acquisition, Investigation, Project administration, Resources, Supervision, Validation, Writing – original draft

Affiliation Railroad Policy Research Department, Korea Railroad Research Institute, Uiwang-Si, Korea

Competing Interests

NO authors have competing interests.