Feng, Ponan

School of Highway, Chang’an University, Xi’an City, Shaanxi Province, China

Wang, Hainian

School of Highway, Chang’an University, Xi’an City, Shaanxi Province, China

Zhang, Xiang

School of Highway, Chang’an University, Xi’an City, Shaanxi Province, China

Mohd Hasan, Mohd Rosli

School of Highway, Chang’an University, Xi’an City, Shaanxi Province, China School of Civil Engineering, Universiti Sains Malaysia, Jalan Transkrian, Nibong Tebal, Penang, Malaysia

You, Zhanping

School of Highway, Chang’an University, Xi’an City, Shaanxi Province, China Department of Civil and Environmental Engineering, Michigan Technological University, Houghton, MI, USA

Gao, Junfeng

School of Highway, Chang’an University, Xi’an City, Shaanxi Province, China