| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for improving safety, by talking to a driver in a car navigation system device for guiding a path. SOLUTION: In a condition where a driving path is along a road, a call is made to the driver at an appropriate time interval of 1/f fluctuation or the like, when the car navigation decides that it will not perform guidance for a fixed time interval by calculation, thus preventing the driver from getting bored. |
