About the Authors

Jinliang Xu

Contributed equally to this work with: Jinliang Xu, Haoru Li

Roles Conceptualization, Funding acquisition, Methodology, Writing – review & editing

Affiliation School of Highway, Chang’an University, Xi’an, Shaanxi, Peoples R China

Haoru Li

Contributed equally to this work with: Jinliang Xu, Haoru Li

Roles Data curation, Formal analysis, Investigation, Methodology, Software, Writing – original draft

2017021045@chd.edu.cn

Affiliation School of Highway, Chang’an University, Xi’an, Shaanxi, Peoples R China

Xiaodong Zhang

Roles Conceptualization, Data curation, Writing – review & editing

Affiliation Chang’an University Journal Center, Xi’an, Shaanxi, Peoples R China

Fangchen Ma

Roles Investigation

Affiliation School of Highway, Chang’an University, Xi’an, Shaanxi, Peoples R China

Zhenhua Sun

Roles Investigation

Affiliations School of Highway, Chang’an University, Xi’an, Shaanxi, Peoples R China, Shaoxing Transportation Investment Group Co. LTD, Shaoxing, Zhejiang, Peoples R China

Competing Interests

The authors have declared that no competing interests exist.