1. Ph.D. Candidate, School of Highway, Chang’an Univ., Middle-section of Nan'er Huan Rd., Xi’an, Shaanxi 710064, China; Engineer, China Merchants Expressway Network & Technology Holdings, No. 118 Jianguo Rd., Chaoyang District, Beijing 100022, China.
2. Professor, School of Highway, Chang’an Univ., Middle-section of Nan'er Huan Rd., Xi’an, Shaanxi 710064, China (corresponding author).
3. Research Fellow, School of Highway, Chang’an Univ., Middle-section of Nan'er Huan Rd., Xi’an, Shaanxi 710064, China.
4. Junior Engineer, Henan Provincial Communications Planning & Design Institute, Zhengkai Ave. and Zeyu St. Intersection, Zhengzhou, Henan 451450, China.