A new national road has been planned in a an area where there is a high number of moose (Akershus county). This working paper describes a model that was developed to estimate the probability of an accident involving moose on the new road. The model is based on observations of tracks in the snow during the 1995/96 winter. The annual expected number of accidents in the main version of the model was estimated to around 7 accidents. The benefits of erecting a game fence along the entire road exceed the costs. If just parts of the road are provided with a fence, it was assumed that some moose will migrate along the fence until they find a crossing location. Possible crossing locations should preferably be grade separated, in the interests of road safety.