A rating is calculated that represents the traffic conditions of a specified driving route that includes at least one road. The driving route is specified by selecting an initial road, selecting a road entry point from which to get on the initial road, selecting a road exit point on which to get off the initial road, and specifying whether the road exit point is the end of the driving route. If the road exit point is not the end of the driving route, another road exit point is selected The above-mentioned steps are then repeated until the road exit point is the end of the driving route. Traffic conditions are then obtained for that driving route and a rating is calculated based on the traffic conditions.