Revision question · Band 3 driving test, disabilities, law

Why is it dangerous to leave rear fog lights on when they're not needed?

Revision material from the imported DVSA bank includes source-checked Lanekind learning corrections. These corrections are not newly issued official examination questions, and practice does not reproduce a live test paper.

Answer options

They can be confused with brake lights

They could cause the battery to fail

They could overload the electrical system

They could stop the indicators working properly

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They can be confused with brake lightsThis was the right answer

If you don't switch off rear fog lights when the fog has lifted, drivers behind may find it difficult to see your brake lights. This can be a particular problem on wet roads and on motorways.

If you leave your rear fog lights on at night, drivers behind are likely to be dazzled and this could put you both at risk.

Reviewed reading for this question

Rule 226Highway Code rule · Use dipped headlights in reduced visibility and fog lights only when visibility is seriously reduced, generally below 100 metres; switch them off as conditions improve.Rule 236Highway Code rule · Use dipped headlights in reduced visibility and fog lights only when visibility is seriously reduced, generally below 100 metres; switch them off as conditions improve.

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