Great Britain Theory Test Coach
Weather and visibilityQuestion 342 of 424

When MUST you use headlights because of poor visibility?

  1. When you cannot see for more than about 100 metres
  2. When you cannot see for more than about 300 metres
  3. When you cannot see for more than about 200 yards
  4. When you cannot see the vehicle behind you
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Correct answer: When you cannot see for more than about 100 metres

Use headlights when you can hardly see. This is generally when you can see less than 100 metres.

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

Practice weather and visibility

Questions last reviewed: 18 October 2026