| 摘要 |
<p>The method involves activating an alerting unit (10) by the action of an alarm releasing person on an alarm release unit (11). The alarm release unit instantly activates the alarm release unit. An optical warning signal e.g. yellow warning signal, is generated by the activation of the alerting unit through a warning light device or a warning flashing device in the alerting unit. The alerting unit is wirelessly communicated with the alarm release unit through a mobile radio net, so that the alerting unit is activated through a mobile telephone. An independent claim is also included for a system for warning road users against wrong way drivers.</p> |
