Revision question · Vehicle handling

Why is it dangerous to leave rear fog lights switched on after the fog has cleared?

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 may be confused with brake lights

The bulbs would fail

Electrical systems could be overloaded

Direction indicators may not work properly

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They may be confused with brake lightsThis was the right answer

If your rear fog lights are left on when it isn’t foggy, the glare they cause makes it difficult for road users behind to know whether you’re braking or you’ve just forgotten to turn off your rear fog lights. This can be a particular problem on wet roads and on motorways. If you leave your rear fog lights on at night, road users behind you are likely to be dazzled and this could put them at risk.

Reviewed reading for this question

Rule 236Highway Code rule · Fog lamps in clear conditions dazzle and can obscure brake lights; switch them off when visibility improves.

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