Why is it potentially dangerous to leave rear fog lights switched on when they’re not required?

Explanation: 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.

Category: Band 3 driving test (2021)

References: The Official DVSA Guide to Driving: Section 12, Highway Code: Rule 236