Great Britain Theory Test Coach
Weather and visibilityQuestion 353 of 424

A sign shows 'Fog' but the road ahead looks clear. What should you expect?

  1. A thick bank of fog, or fog that drifts in patches
  2. The fog has already cleared
  3. Fog on the opposite carriageway only
  4. A permanent speed camera
Show answer

Correct answer: A thick bank of fog, or fog that drifts in patches

Fog can appear suddenly, even if it seems to be clearing. Be ready to slow down.

Source: The Highway Code (Department for Transport, GOV.UK), Driving in adverse weather conditions (226 to 237), Rule 234

Practice weather and visibility

Questions last reviewed: 18 October 2026