Traffic management in National Parks is necessary in order to avoid the negative effects of car traffic. Implementing traffic management measures can be difficult, due to public resistance or other problems. A research project in the Veluwezoom National Park in The Netherlands shows that there are two important reasons for problematic implementation. The first reason is a lack of knowledge about the recreational use of the area. The second reason is the interdependence of actors involved. Both aspects need to be considered and related to each other in order to make more realistic traffic management plans.