1. Beijing Key Laboratory of Traffic Engineering, Faculty of Architecture, Civil and Transportation Engineering, College of Metropolitan Transportation, Beijing University of Technology, Chaoyang, Beijing, China
2. Department of Civil and Environmental Engineering, Michigan Technological University, Houghton, MI, USA
3. Hunan Expressway Group Company Ltd., Kaifu, Changsha, Hunan, China
4. Testing and Consulting Company Ltd., Changsha University of Science and Technology, Changsha, Hunan, China