1. School of Transportation Science and Engineering, Harbin Institute of Technology, 73 Huanghe Rd., Xianfenglu St., Nangang District, Harbin 150090, P.R. China
2. Institute of Highway Engineering, Rheinisch-Westfälische Technische Hochschule Aachen University, Mies-van-der-Rohe-Str. 1, 52074 Aachen, Germany, https://orcid.org/0000-0001-5983-7305
3. School of Qilu Transportation, Xinglongshan Campus, Shandong University, 12550 Erhuan E. Rd., Xinglong St., Jinan 250002, P.R. China (Corresponding author), e-mail: zhige@sdu.edu.cn, https://orcid.org/0000-0001-5719-5791
4. Institute of Highway Engineering, Rheinisch-Westfälische Technische Hochschule Aachen University, Mies-van-der-Rohe-Str. 1, 52074 Aachen, Germany (Corresponding author), e-mail: wang@isac.rwth-aachen.de, https://orcid.org/0000-0003-1064-3715