1. Department of Transport and Planning, Faculty of Civil Engineering and Geosciences, Delft University of Technology, P.O. Box 5048, 2600 GA Delft, Netherlands
2. ARANE Adviseurs in Verkeer en Vervoer, 2805 TD Gouda, Netherlands
3. Praktijkproef Amsterdam, Toekanweg 7, 2035 LC Haarlem, Netherlands