When may hazard warning lights be used while driving?
- A To thank a driver who has let you move back to the left after overtaking
- B As a warning to drivers that you're towing another vehicle
- C To show you want to go ahead when your position suggests otherwise
- D When on motorways or dual carriageways, to warn drivers behind of a hazard ahead
Why this is the answer
Use your hazard warning lights on a motorway or unrestricted dual carriageway to warn following drivers of an obstruction or hazard ahead. This will alert drivers who may not be able to see the hazard due to the size of your vehicle.
Why the other answers don't fit
- A
- To thank a driver who has let you move back to the left after overtaking — They are a warning, not a courtesy signal.
- B
- As a warning to drivers that you're towing another vehicle — Towing is shown by the vehicles, not by flashing lights.
- C
- To show you want to go ahead when your position suggests otherwise — Your intention is shown by your indicators and your position.
Where this question comes from
The question, its options and the explanation are reproduced word for word from the DVSA revision question bank under licence. The licence requires them to appear unaltered, so we cannot reword them and neither can anyone else — that is why you will meet the same wording on other sites. Everything else on this page is written by Theory Hub: the explanation of why each wrong answer is wrong, the topic guide and the revision notes.
Asked in: Lorry & Bus (LGV/PCV)
More questions on Leaving the vehicle
- How should you stand when you're lifting a heavy object?
- What do you need to consider when transporting a high-value cargo of cigarettes?
- What must you do before leaving your bus?
- What must you do before you leave your vehicle?
- What should you be aware of before opening your cab door?
- What should you be careful of when stopping on the left in a busy place?
- What should you consider having on your vehicle to combat theft?
- What should you do before getting out of your bus?