1. School of Traffic and Transportation Engineering, Changsha University of Science and Technology, 960 Wanjiali S. Rd., Changsha, Hunan Province 410004, China https://orcid.org/0000-0003-0426-5033
2. School of Traffic and Transportation Engineering, Changsha University of Science and Technology, 960 Wanjiali S. Rd., Changsha, Hunan Province 410004, China
3. School of Traffic and Transportation Engineering, Changsha University of Science and Technology, 960 Wanjiali S. Rd., Changsha, Hunan Province 410004, China (Corresponding author), e-mail: ccliucs@qq.com, https://orcid.org/0000-0002-2316-2411