| 摘要 |
PURPOSE: To organically combine the traffic information broadcast reception function and the map display function to effectively use them by displaying a map on a picture display means at the time of receiving the traffic information broadcast. CONSTITUTION: The output level of a tuning circuit only for the traffic information broadcast frequency or the reception frequency of a radio receiver 2 is temporarily taken as the traffic information broadcast frequency to monitor the output level at this time, thereby discriminating whether the traffic information broadcast can be received or not by a microcomputer 3. If it can be received, the reception frequency of the radio receiver 2 is taken as the traffic information broadcast frequency, and the present position of the vehicle itself is read in from a position detection part 6, and a map corresponding to this present position is read out from a map storage device 7 by retrieval and is displayed on a display device 5. When the start point of a traffic snarl is inputted by an input means, the distance from the position of the vehicle to the start point of the snarl is displayed. |
