| 摘要 |
<p>To give advice to a driver of a vehicle of the presence of another vehicle closely ahead, and of misty or foggy conditions. Means (7,C3) able to be charged by light from a vehicle headlight, and a visible signal means (8;13,15) connected to and activated by said chargeable means (7,C3), activates said signal means (8;13,15) for a discrete period of time after said headlight has ceased to illuminate said chargeable means (7,C3) and until said chargeable means (7,C3) has discharged. As a result, a trail of signals is permanently provided behind a lead vehicle to give warning to a vehicle behind of its presence and to a distance that constitutes a safe braking distance. <IMAGE></p> |
