When should you use your hazard warning lights on a motorway?

Explanation: You can use your hazard warning lights to warn traffic behind on a motorway of a hazard up ahead. This quickly passes the message through traffic, reducing the risk of collision between slowing vehicles.

Category: Incidents, accidents and emergencies (2021)

References: The Official DVSA Guide to Driving: Section 3, The Official DVSA Guide to Driving: Section 11, The Official DVSA Guide to Driving: Section 15, The Official DVSA Guide to Driving: Section 16, Highway Code: Rule 116, Highway Code: Rule 274