1. School of Civil Engineering, Lanzhou University of Technology, No. 287, Langongping Rd., Qilihe District, Lanzhou, Gansu 730050, China; and Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang’an University, Middle Section of South Erhuan, Xi’an, Shaanxi 710064, China, http://orcid.org/0000-0002-4800-1243
2. Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang’an University, Middle Section of South Erhuan, Xi’an, Shaanxi 710064, China (Corresponding author), e-mail: zhengml@chd.edu.cn, https://orcid.org/0000-0002-8445-2009
3. Guangdong Nanyue Transportation Investment and Construction Co., Ltd., No. 27 Baiyun Rd., Guangzhou 510000, China
4. Anhui Transport Consulting & Design Institute Co., Ltd., No. 180, Xiangzhang Ave., High-tech Zone, Hefei 230088, China
5. Highway Administration Bureau of Rizhao City, 7 Yantai Rd., Rizhao, Shandong 276826, China
6. Highway Administration Bureau of Dezhou City, 1255 Mid Dongfeng Rd., Decheng District, Dezhou, Shandong 253006, China