| 摘要 |
<p>By utilizing an existing device, the initial cost is reduced. A blind curve and a narrow road such as a mountain road having a high possibility of danger of collision are detected in advance and the danger of collision is evaded in advance. For this, a current position calculation section calculates the current position, the direction, and the speed. When a running road judgment section judges that the currently running road is a blind narrow curve such as a mountain road, it transmits identification information for identifying the local device and the current position information to an external server via communication means. According to the approach information on the oncoming car or the following car too near received from the server, a route guiding section searches a place where passing each other is possible and displays it on a display section. It should be noted that navigation devices can exchange information directly with each other.</p> |
