Patent ID: 7912636
Filing Date: 2011-03-22
Classification: G01C

Abstract:
1. A navigation apparatus for use in a vehicle comprising: a position determination information acquisition unit that acquires position determination information required for determining a current position; a road information acquisition unit that acquires road information required for determining a traffic direction of a road that has a distinction of traffic directions; a notification unit that notifies various information; a travel speed information acquisition unit that acquires travel speed information representing a travel speed of the vehicle, and a control unit that determines, for notification of information on the traffic direction by the notification unit, the traffic direction of the road by determining a currently traveling road that is traveled by the vehicle based on the position determination information acquired by the position determination information acquisition unit and the road information acquired by the road information acquisition unit, wherein information on the traffic direction notified by the notification unit under control of the control unit is an arrangement of all or a part of address numbers in the road information, the control unit chooses the address numbers for address number notification by the notification unit, and an interval of the address numbers to be notified is determined according to the travel speed of the vehicle derived from the travel speed information acquired by the travel speed information acquisition unit.