Abstract: Apparatus for determining a route for a road vehicle for a user comprising: a database of information pertaining to roads, the information comprising geographic data that includes map, location and configuration data for the roads, the information further comprising data indicative of a plurality of road characteristics or limits that pertain to the roads; a program having a first operation that compares a multiplicity of selected characteristics or limits of the road vehicle to the data indicative of the plurality of road characteristics or limits contained within the database and a second operation that computes one or more authorized road routes for the road vehicle; wherein the program includes instructions that compute one or more unauthorized road routes or portions of unauthorized road routes having road characteristics that are not complementary to or do not match the selected characteristics or limits of the road vehicle.