At night, what does it mean if you see a pedestrian wearing reflective clothing and carrying a bright red light?

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At night, what does it mean if you see a pedestrian wearing reflective clothing and carrying a bright red light?

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The people on the walk should be keeping to the left, but do not assume this. Pass carefully, making sure you have time to do so safely. Be aware that the pedestrians have their backs to you and may not know that you’re there.