1. Ph.D. Student, Center for Railway Engineering, School of Engineering and Technology, Central Queensland Univ., Rockhampton, QLD 4701, Australia (corresponding author).
2. Associate Professor, Center for Railway Engineering, School of Engineering and Technology, Central Queensland Univ., Rockhampton, QLD 4701, Australia.
3. Lecturer, School of Engineering and Technology, Central Queensland Univ., Rockhampton, QLD 4701, Australia.