Patent ID: 7788031
Filing Date: 2010-08-31
Classification: G01C

Abstract:
1. A routing assistance system provided in a vehicle, the system comprising: a guidance unit that provides the vehicle with guidance along a guided route including a rotary intersection, which the vehicle enters via an entrance road; a guidance control unit that causes the guidance unit to provide guidance with respect to an exit road of the rotary intersection; and a determination unit that executes a determination of whether or not the rotary intersection has a predetermined simple shape and a scale smaller than or equal to a predetermined scale, wherein, when the determination is affirmed, the guidance control unit causes the guidance unit to provide a first guidance with respect to a direction of an exit road about which guidance is to be provided, relative to the entrance road, and when the determination is negated, the guidance control unit causes the guidance unit to provide a second guidance with respect to from what number exit road of a plurality of exit roads of the rotary intersection, relative to the entrance road, the vehicle is to exit.