1. Ph.D. Student, Section of Railway Engineering, Delft Univ. of Technology, 2628 CD Delft, Netherlands.
2. Assistant Professor, Section of Railway Engineering, Delft Univ. of Technology, 2628 CD Delft, Netherlands (corresponding author).
3. Professor, Section of Railway Engineering, Delft Univ. of Technology, 2628 CD Delft, Netherlands.
4. Associate Professor, Section of Railway Engineering, Delft Univ. of Technology, 2628 CD Delft, Netherlands.