[Yao, Ding; Yu, Xiaolan] Changsha Univ Sci & Technol, Dept Traff & Transportat Engn, Changsha 410114, Hunan, Peoples R China.
[Qian, Guoping] Changsha Univ Sci & Technol, Key Lab Special Environm Rd Engn Hunan Prov, Dept Traff & Transportat Engn, Changsha 410114, Hunan, Peoples R China.
[Yao, Jialiang] Changsha Univ Sci & Technol, Minist Transport Changsha, Key Lab Rd Struct & Mat, Dept Traff & Transportat Engn, Changsha 410114, Hunan, Peoples R China.
[Liu, Jiawu] Hunan Huida Planning Survey & Design Res Co Ltd, Dept Traff & Transportat Engn, 31 Xiangfu West Rd, Changsha 410004, Hunan, Peoples R China.