The temporary 'accident' warning sign is set out by police or road operators following a collision or incident on the carriageway.
It warns approaching motorists to slow down immediately as stationary vehicles, debris, or emergency personnel may block the road.
What this sign means
This sign features the word 'Accident' inside a red warning triangle, or on a temporary yellow backing board.
It indicates an active incident scene ahead with reduced lane capacity, stopped traffic, or emergency responders on foot.
- Temporary warning triangle with 'Accident' text
- Signifies obstruction or emergency emergency activity ahead
- Often deployed alongside flashing warning lights
What to do when you see it
Reduce speed safely, do not rubberneck, and follow all instructions given by police or traffic officers at the scene.
- Check mirrors and slow down smoothly
- Keep full concentration on driving past the scene
- Be prepared to stop or merge as directed by emergency personnel
How this sign is tested
Theory questions test knowledge of emergency procedures, hazard light usage, and responding to temporary police signage.
- Recognising temporary emergency warning signs
- Proper use of hazard warning lights when approaching queues
- Obeying signals given by police and traffic officers
Common mistakes
Slowing down abruptly without checking mirrors, or distraction caused by gawking at the accident scene.
Test yourself on this one
Road and traffic signs is the biggest category in the question bank with 102 questions, and signs turn up inside other categories too. Work through them free, no sign-up needed.
Practise road sign questionsFrequently asked questions
Is this a permanent road sign?
No. It is a temporary sign placed on the road during or immediately after an emergency incident.
Can I use hazard warning lights when approaching an accident queue?
Yes. You may briefy turn on hazard warning lights on motorways or dual carriageways to warn drivers behind of a sudden slowdown.
Who has authority to direct traffic at an accident scene?
Police officers, DVSA traffic officers, and accredited breakdown responders.