1. Associate Professor, School of Highway, Chang’an Univ., South Erhuan Middle Section, Xi’an, Shaanxi 710064, China.
2. Ph.D. Candidate, Dept. of Civil and Environmental Engineering, Michigan Technological Univ., 1400 Townsend Dr., Houghton, MI 49931.
3. Professor, Dept. of Civil and Environmental Engineering, Michigan Technological Univ., 1400 Townsend Dr., Houghton, MI 49931 (corresponding author).
4. Professor, School of Highway, Chang’an Univ., South Erhuan Middle Section, Xi’an, Shaanxi 710064, China.
5. Ph.D. Candidate, School of Highway, Chang’an Univ., South Erhuan Middle Section, Xi’an, Shaanxi 710064, China.