1. School of Civil Engineering and Transportation, South China University of Technology, Guangzhou, Guangdong, P.R. China;
2. Key Laboratory of Automobile Transportation Safety Support Technology, Chang’an University, Xi’an, Shanxi, China;
3. Guangzhou Highway Engineering Company, Guangzhou, Guangdong, China;
4. Uncertainty Decision-Making Laboratory, Sichuan University, Chengdu, Sichuan, P.R. China;
5. Department of Civil and Environmental Engineering, University of Washington, Seattle, Washington