ROUTENFÜHRUNGSSYSTEM UND -PROGRAMM

It is possible to display a lane guide map that takes into consideration connections between each of the lanes (m1 to m8) and reduction in the visibility of the lane guide map is prevented. The invention includes a current position detecting unit; a lane list setting processing means that produces a lane list (LsI 1) that takes into consideration connections between each of the lanes for lane groups (LkI 1 to LkI 3) in road links that are present in a lane list display section; a rendering range determination processing means that determines whether or not the number of lanes in the lane list (LsI 1) is larger than the number of lanes that has been set in a display unit (35); and a display range adjustment processing means that selects predetermined lanes in the lane list (LsI 1) and displays only the selected lanes. Lanes that have a low display necessity can be removed.