Below a copy of an older post on Night Vision. In Europe the NV warning is shown with a strong, pencil shaped beam pointed at the object, so you directly see what you may hit against.
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The video below shows a thin flashing beam directed at a small animal crossing a rural road at night.
The animal had been detected by the Night Vision infrared camera and the flashing beam is intended to warn the driver.
In real life the flashing beam is far stronger than shown in the video.
(The dashcam is BMW's Advanced Car Eye)