1. Dept. of Civil Engineering, UGent, Belgium; Transportation Research Institute (IMOB), UHasselt, Agoralaan, Belgium.
2. Faculty of Engineering Technology, UHasselt, Agoralaan, Belgium; Transportation Research Institute (IMOB), UHasselt, Agoralaan, Belgium.
3. Dept. of Civil Engineering, UGent, Belgium.
4. Transportation Research Institute (IMOB), UHasselt, Agoralaan, Belgium.
5. Dept. of Civil Engineering, UGent, Zwijnaarde, Belgium.