When are you allowed to use hazard warning lights?
- A When stopped and temporarily obstructing traffic
- B When travelling during darkness without headlights
- C When parked on double yellow lines to visit a shop
- D When travelling slowly because you're lost
Why this is the answer
You must not 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.
Why the other answers don't fit
- B
- When travelling during darkness without headlights — You must have your headlights on. Hazard lights are no substitute for them.
- C
- When parked on double yellow lines to visit a shop — Hazard lights do not excuse illegal parking.
- D
- When travelling slowly because you're lost — Being lost is not a hazard to warn others about.
Where this comes from
- Driving: the essential skills — section 3, section 11, section 15, section 16
- The Highway Code — rule 116
Rule numbers link to The Highway Code on gov.uk.
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: Car , Motorcycle
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