About the Authors

Xiangwu Luo

Roles Data curation, Formal analysis, Investigation, Resources, Validation, Visualization, Writing – original draft

Affiliation Gansu Province Transportation Planning Survey & Design Institute Co., Ltd, Lanzhou City, China

Wen Song

Roles Conceptualization, Methodology, Supervision, Writing – review & editing

benxionghao@163.com

Affiliation Gansu Province Transportation Planning Survey & Design Institute Co., Ltd, Lanzhou City, China

Competing Interests

The authors have declared that no competing interests exist.