1. School of Civil Engineering, Southwest Jiaotong University, Chengdu, People’s Republic of China
2. Key Laboratory of High-Speed Railway Engineering of Ministry of Education, Southwest Jiaotong University, Chengdu, People’s Republic of China
3. School of Mechanical Engineering, Southwest Jiaotong University, Institute of tribology, Chengdu, People’s Republic of China
4. Science and Technology Center, Inner Mongolia Expressway Group Co. LTD, Inner Mongolia, People’s Republic of China
5. Inner Mongolia Integrated Transportation Research Institute, Inner Mongolia, People’s Republic of China
6. Pike Industries, Inc., A CRH Company, Portsmouth, NH, USA