Patent ID: 8234064
Filing Date: 2012-07-31
Classification: G01C

Abstract:
1. A route guidance system comprising: a current position detecting unit that detects a current position of a vehicle as a position of a guided vehicle; a lane guidance unit that executes lane guidance such that the vehicle passes through, in sequence, a recommended lane of a lane group for each of a plurality of road links; a lane list display section setting unit that sets a section within a range of a predetermined distance ahead of the position of the guided vehicle as a lane display section based on the position of the guided vehicle, road data, and intersection data; a lane list setting processing unit that determines connections between lanes of the lane groups at each of the road links, such that, at each of the intersections, entrance roads that enter the intersection and exit roads that exit from the intersection are linked; the lane list setting processing unit that produces a lane list, wherein the lane list comprises the plurality of lane groups with connections between each lane of a lane group of each road link that is present in the lane list display section at each intersection within the predetermined distance ahead of the position of the guided vehicle; a rendering range determination processing unit that determines whether or not a number of lanes in the lane list is larger than a number of lanes set in a display unit; a display range adjustment processing unit that adjusts the display range of the lane list to conform to the maximum rendering range of the display unit based on the structure of the lane groups of the road links and the position of the recommended lane in the road links ahead of a guided intersection; and the display range determination processing unit that, in a case in which the number of lanes in the lane list is larger than the number of lanes set in the display unit, displays via the display unit the lanes of the road link corresponding to an exit direction from the guided intersection that are selected to fit within a display range.