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DGT Glossary
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Fog lights

Special lights to improve visibility (yours and others') in fog, heavy rain or snow.

Definition

Fog lights are for low-visibility conditions: dense fog, heavy rain or heavy snow. Front fog lights are optional; rear fog lights — a more intense red than position lights — are mandatory and may only be used with visibility under 50 metres.

Key facts

  • Rear fog lights are mandatory; front are optional.
  • Using rear fogs in good visibility can dazzle other drivers and is fineable.
  • Activate only when visibility falls below 50 m (dense fog, heavy rain, snow).

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