1. Department of Roadway Engineering, School of Transportation, Southeast University, No. 2 SEU Rd., Nanjing, Jiangsu Province 211189, China
2. National Demonstration Center for Experimental Road and Traffic Engineering Education, Southeast University, Nanjing 211189, China, https://orcid.org/0000-0001-7461-9226 (Q.D.)
3. National Demonstration Center for Experimental Road and Traffic Engineering Education, Southeast University, Nanjing 211189, China (Corresponding author), e-mail: guxingyu1976@seu.edu.cn, https://orcid.org/0000-0002-8561-7223