Correct answer
Reduces visibility.
Thick fog reduces visibility and makes hazards and other road users harder to detect in time. Adapt speed, increase distance and use required lights without dazzling. Moisture may leave the road wet and reduce grip; fog itself does not invariably change tyre grip. If safe driving is impossible, leave the road for a safe place when possible, without stopping dangerously on the carriageway.
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Reduces visibility.
Reduces the risk of skidding.
Increases tyre grip.
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