1. Department of Road and Railway Engineering, School of Transportation, Jilin University, 5988 Renmin St., Changchun 130025, China, http://orcid.org/0000-0003-0559-9078 (L.H.)
2. Department of Road and Railway Engineering, School of Transportation, Jilin University, 5988 Renmin St., Changchun 130025, China (Corresponding author), e-mail: yangpengz16@mails.jlu.edu.cn, http://orcid.org/0000-0001-9642-2918