1. Associate Professor, Dept. of Civil Engineering, Bangladesh Univ. of Engineering and Technology, Dhaka 1000, Bangladesh.
2. PT. Jasa Marga (Persero), Indonesia Highway Corporation, Padalarang Bypass Project, Plaza Tol TMII, Jakarta 13550, Indonesia.
3. Dept. of Civil Engineering, Chittagong Univ. of Engineering and Technology, Chittagong 4349, Bangladesh.
4. Associate Professor, Dept. of Civil and Environmental Engineering, Saitama Univ., 255 Shimo Okubo, Saitama 338-8570, Japan (corresponding author).