About the Authors

Song Wang

Contributed equally to this work with: Song Wang, Zhixia Li

Roles Conceptualization, Investigation, Writing – original draft

Affiliation Center for Transportation Innovation, Department of Civil and Environmental Engineering, University of Louisville, Louisville, Kentucky, United States of America

Zhixia Li

Contributed equally to this work with: Song Wang, Zhixia Li

Roles Conceptualization, Funding acquisition, Methodology, Supervision

richard.li@louisville.edu

Affiliation Center for Transportation Innovation, Department of Civil and Environmental Engineering, University of Louisville, Louisville, Kentucky, United States of America

Competing Interests

The authors have declared that no competing interests exist.