Patent ID: 8918281

Claim:
A navigation apparatus for performing a route guidance based on a ready-made map data and a learned road data when a vehicle is traveling, wherein the ready-made map data includes a prestored road, wherein the learned road data includes a learned road, wherein a new road is detected and registered as the learned road in the learned road data based on a movement trace of the vehicle from a point where a present position of the vehicle departs from the prestored road or an already-registered learned road to a point where the present position of the vehicle returns to the prestored road or the already-registered learned road, the navigation apparatus comprising: a guidance control device that, when a set guidance route passes through a circular intersection, provides a user with a guidance about an exiting road of the circular intersection at a predetermined timing; and a determination device that determines whether or not the learned road in the learned road data, which was detected and registered based on the movement trace of the vehicle mounted with the navigation apparatus comprising the determination device, is included in connection roads of the circular intersection serving as a guidance target of the guidance control device, wherein each of the connection roads of the circular intersection is the prestored road or the already registered learned road and is connected to the circular intersection, wherein: when the determination device determines that the learned road in the learned road data is not included in the connection roads of the circular intersection, the guidance control device provides the guidance about the circular intersection in an exit number mode; when the determination device determines that the learned road in the learned road data is included in the connection roads of the circular intersection, the guidance control device provides the guidance about the circular intersect on in a learned road guidance mode; in the exit number mode, the guidance control device provides the guidance about the exiting road of the circular intersection by providing the user with an exit number of the exiting road from among exit numbers of the connection roads of the circular intersection to indicate from which of the connection roads the vehicle is to exit the circular intersection; in the learned road guidance mode, the guidance control device provides the guidance about the exiting road of the circular intersection without providing the user with the exit number; and the learned road guidance mode is distinct in a guidance content from the exit number mode.