How should you use headlights in poor visibility?

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In poor visibility, use low beams. High beams bounce off fog, rain, or snow and create glare that makes it harder to see and can blind other drivers. Low beams light the road more toward the surface, reducing glare while still letting you see ahead.

If your vehicle has fog lights, turn them on in addition to the low beams and use them when visibility remains poor. Fog lights are aimed low to illuminate the road surface and edges without reflecting back into your eyes, helping you detect lane markings, curves, and obstacles more clearly in dense fog or heavy precipitation.

Avoid turning off headlights or using only parking lights. Parking lights are too dim to provide adequate visibility or to make you clearly seen by others. The basic rule is to illuminate the road with low beams and supplement with fog lights if available when conditions are still challenging.