IMPROVED NAVIGATION DEVICE AND METHOD

A method of correcting map data stored on a portable navigation device (PND) or navigation system is described, together with an appropriately enabled PND or navigation system. A computer program enabling the method is also described. The method includes the steps of displaying map data on a PND or navigation system during a navigation or free-driving mode, and is characterized in that at least one of a plurality of user-selectable graphical indicators is displayed together with said map data adjacent or overlaid on the particular thoroughfare along which the device is currently traveling, said indicator graphically representing a travel restriction pertinent to one of either the current thoroughfare or a subsequent thoroughfare occurring after a thoroughfare intersection towards which the current thoroughfare leads, and is further characterized in that the user selection of said graphical indicator causes display of one or more other similar user- selectable graphical indicators, selection of which causes both a correction to be stored in or removed from memory, said correction including both identification of the travel restriction selected or removed and the relevant thoroughfare to which said restriction applies, and the subsequent display of the at least some of the map information displayed immediately prior to the selection of the user-selectable graphical indicator.