Abstract: A navigation apparatus having a road learning function includes a detector, a memory, an identifying device, a determination device, and a guidance device. The detector creates a learned road link connecting exit and return points in an existing link. The memory stores road information representing that the existing link forms a continuous road at an end of the learned road link. The identifying device identifies an entrance link into the end of the learned road link and an exit link from the end of the learned road link in a route. The road determination device determines whether the entrance and exit links form the continuous road. The guidance device prohibits the guidance on a direction to go at the end of the learned road link when the road determination device determines that the entrance and exit links form the continuous road.

Abstract: A navigation apparatus having a road learning function includes a detector, a memory, an identifying device, a determination device, and a guidance device. The detector creates a learned road link connecting exit and return points in an existing link. The memory stores road information representing that the existing link forms a continuous road at an end of the learned road link. The identifying device identifies an entrance link into the end of the learned road link and an exit link from the end of the learned road link in a route. The road determination device determines whether the entrance and exit links form the continuous road. The guidance device prohibits the guidance on a direction to go at the end of the learned road link when the road determination device determines that the entrance and exit links form the continuous road.