Abstract: The present invention relates to vehicles, specifically to an improved navigation system. In order to provide a technology, which will permit drivers of vehicles to better predict consumption and to conserve energy, for example energy in the form of electric battery power or fuel, and to extend the vehicle's driving range, a method for optimizing a driving range of a vehicle, the method typically comprising the following steps: a) predicting driving routes based on a determined start and target route points based on a stored road network model; b) providing additional situation related data comprising environmental factors; c) calculating energy consumption of energy stored on board the vehicle for the predicted driving routes based on the situation related data; and d) determining a most economical route with regards to a minimized energy consumption.