1. Professor, School of Qilu Transportation, Shandong Univ., Jinan 250002, China; formerly, Postdoctor Fellow, School of Civil Engineering, Univ. of Leeds, LS2 9JT Leeds, UK. ORCID: .
2. Director, Shandong Provincial Communications Planning and Design Institute Co. Ltd., Jinan 250031, China; formerly, Ph.D. Candidate, School of Qilu Transportation, Shandong Univ., Jinan 250002, China (corresponding author).
3. Professor, School of Qilu Transportation, Shandong Univ., Jinan 250002, China.
4. Postgraduate Student, School of Qilu Transportation, Shandong Univ., Jinan 250002, China.
5. Professor, School of Civil Engineering, Univ. of Leeds, LS2 9JT Leeds, UK.