1. Distinguished Professor of Civil Engineering, Director, Transport Research Centre, Univ. of Technology Sydney, Ultimo, NSW 2507, Australia; Director, ARC Industrial Transformation Training Centre for Advanced Technologies in Rail Track Infrastructure, ITTC-Rail, Univ. of Wollongong, Wollongong, NSW 2522, Australia (corresponding author).
2. Postgraduate Research Student, Centre for Geomechanics and Railway Engineering, and ITTC-Rail, Univ. of Wollongong, Wollongong, NSW 2522, Australia.
3. Research Fellow, Transport Research Centre, Univ. of Technology Sydney (UTS), Ultimo, NSW 2007, Australia.
4. Professor of Civil Engineering, Univ. of Newcastle, Univ. Drive, Callaghan, NSW 2308, Australia. ORCID: .