1. Faculty of Bridge and Road, Ha Noi University of Civil Engineering, 55 Giai Phong, Hai Ba Trung, Ha Noi 10000, Vietnam
2. Faculty of Transport Economics, University of Transport and Communications, 3 Cau Giay, Lang Thuong, Dong Da, Ha Noi 100000, Vietnam
3. College of Science and Engineering, Ritsumeikan University, 1-1-1 Nojihigashi, Kusatsu 525-8577, Japan