Patent ID: 7584050

Claim:
A navigation system provided in a vehicle, the navigation system comprising: a distance computing unit for acquiring route information indicating a route to a destination and position information indicating a present position of the vehicle, and for determining a distance to a guidance point included in the route information; a driving data acquiring unit for acquiring driving data including speed information about the vehicle and operation information about an operation that relates to a driver of the vehicle and has influence on a running state of the vehicle; an action predicting unit for predicting, with respect to the driver, an action at the guidance point based on a history of the acquired driving data; and an audio guidance executing unit for executing audio guidance about the guidance point when the determined distance is equal to or less than a preset allowable value and the predicted action disagrees with an action that the driver is required to take at the guidance point, wherein the guidance point is a branch included in the route, and wherein, with respect to the driver, an action at the guidance point is an operation of the driver based on a direction following the route.