| 摘要 |
An actual running distance ab from a starting position (A) to a present position (B) of a vehicle is calculated based on input starting position data and positions continuously detected using a GPS device (4) or similar. An estimated running distance bc from the present position to a destination (C) is calculated based on the detected present position and input destination data. A degree of attainment T representing the degree of approach to the destination is calculated according to the equation: <MATH> and is indicated on a display (12) to a driver. <IMAGE> |
