Revision question · Incidents, accidents and emergencies

When are you allowed to use hazard warning lights?

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

When stopped and temporarily obstructing traffic

When travelling during darkness without headlights

When parked on double yellow lines to visit a shop

When travelling slowly because you're lost

Show the answer

When stopped and temporarily obstructing trafficThis was the right answer

You mustn't use hazard warning lights while moving, except to warn traffic behind when you slow suddenly on a motorway or unrestricted dual carriageway.

Never use hazard warning lights to excuse dangerous or illegal parking.

Reviewed reading for this question

Rule 116Highway Code rule · Distinguish a stationary obstruction warning from a brief warning of suddenly slowing motorway traffic.

Loading the questions