On a dual carriageway in fog you can see about 90 metres ahead. What does the Highway Code say about lights?
Answer and explanation
Correct answer: B. You must use headlights, and you may also use fog lights
- Step 1: Headlights are required when visibility is seriously reduced, generally when you cannot see more than 100 m. Step 2. At 90 m you are below that figure, so headlights are required and fog lights may also be used. Answer: You must use headlights, and you may also use fog lights. Why not the others: Sidelights are too dim, headlights are not replaced by fog lights, and 90 m is inside the 100 m threshold.
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