You’re driving on a motorway. What does it mean if the car ahead shows its hazard warning lights for a short time?

Explanation: Hazard warning lights mustn't be switched on in normal driving. The exception is when driving on a motorway or unrestricted dual carriageway and there's a need to warn drivers behind of a hazard or obstruction ahead.

Category: Band 2 traffic signs and signals

References: The Official DVSA Guide to Driving: Section 11