1. Paris - Est Université; IFSTTAR - SPLOTT; 14-20 Boulevard Newton, Cité Descartes Champs sur Marne F-77447 Marne la Vallée Cedex 2 France
2. Department of Regional, port and Transport Economics; Erasmus University Rotterdam, the Netherlands; PO Box 1738 3000 DR Rotterdam The Netherlands
3. PBL - Netherlands Environmental Assessment Agency; The Hague the Netherlands