| 摘要 |
A lane marker which is attached to the surface of a road to define the boundary between two lanes, and which is adapted to receive light from the headlights of a rear one of two vehicles traveling in the same direction on the road and direct a portion of that light forwardly from the marker for viewing from the forward vehicle, to indicate to the driver of the forward vehicle the position of the rear vehicle with respect to the marker. The device includes a prism or other light directing unit or assembly acting by refraction and/or reflection to aim the light forwardly within a preferably limited angle assuring sufficient intensity of the light for effective viewing by the driver of the forward vehicle. The device may also reflect some of the light back to the trailing vehicle for viewing by its driver.
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