1. A method of providing cost information associated with intersections of a road network, comprising: receiving, for a plurality of intersections, driving data indicative of at least one condition of a vehicle upon passage of the vehicle through the plurality of intersections; determining for each intersection in the plurality of intersections a set of features values associated with the respective intersections; adjusting parameters associated with passage through intersections in an intersection cost module, said intersection cost module being configured to provide a cost value in response to receipt of a set of feature values associated with a junction and the parameters being adjusted based on receipt of driving data and the sets of features value determined for the plurality of intersections.