Patent ID: 9062987
Filing Date: 2015-06-23
Classification: G01C

Abstract:
1. A travel guidance system comprising: a navigation-route setting unit configured to set a navigation route along which a movable body is guided and sets a guidance junction on the navigation route, wherein the movable body is a vehicle; a traffic-light-position acquiring unit configured to acquire a position of an exit-side traffic light at a preceding junction that is located closer to a departure place of the navigation route than the guidance junction; a movable-body-position acquiring unit configured to acquire a position of the movable body; a guidance-starting-point acquiring unit configured to acquire a position of a guidance starting point, the guidance starting point being determined from a position of the movable body relative to the exit-side traffic light at the preceding junction and serving as a point where guidance on the guidance junction starts; a passage determining unit configured to determine whether or not the movable body has passed through the guidance starting point from the position of the movable body and the position of the guidance starting point; a junction guiding unit configured to start the guidance on the guidance junction when the passage determining unit determines that the movable body has passed through the guidance starting point, a vehicle-information acquiring unit configured to acquire vehicle information relating to the vehicle; and a switching-point determining unit configured to determine a switching point at which a state of the exit-side traffic light at the preceding junction is switched from visible to invisible to an occupant of the vehicle from the vehicle information, and the guidance starting point is the switching point.