You’ve been driving in fog. What must you do when the visibility improves?

Explanation: You must turn off your fog lights if visibility is more than 100 metres (328 feet). Be prepared for the fact that the fog may be patchy and you may need to turn them on again if the fog returns.

Category: Vehicle handling

References: The Official DVSA Guide to Driving: Section 12, Highway Code: Rule 114, Highway Code: Rule 226