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Theory test / Incidents, accidents and emergencies

Incidents, accidents and emergencies theory test questions

Up to date with the current Highway CodeLast reviewed October 2026

Incidents, accidents and emergencies questions cover what to do when something goes wrong: breaking down, stopping at or passing a collision, giving basic first aid, dealing with vehicles carrying dangerous goods, getting stuck on a level crossing and what the law makes you do after a crash. Most of it comes from Rules 275 to 287 of the Highway Code and Annex 7, First aid on the road, with level crossings in Rule 299.

For a breakdown, start with Rule 275: try to stop in a place of relative safety, and on a motorway the safest is a service area, then an emergency area or the hard shoulder. On ordinary roads, put a warning triangle at least 45 metres behind your car on the same side of the road, but never on a motorway (Rule 276). On a motorway the advice is Go left, Get safe, Get help (Rule 277). Get out on the side away from traffic and wait behind the barrier. If you cannot reach the left lane or a safe place, or cannot get out safely, stay in the car with your seat belt on and hazard lights on, and call 999 for the police. From an emergency area you MUST use the emergency telephone before rejoining (Rule 278).

At the scene of a collision (Rule 283), use your hazard lights, ask drivers to switch off their engines and stop anyone smoking, call 999 with the exact location and number of casualties, and move uninjured people to safety. Do not move injured people from their vehicles unless they are in immediate danger, and do not remove a motorcyclist's helmet unless it is essential. A common trap is the dangerous goods question: if a tanker or a lorry with orange plates is involved, keep well away, do not try a rescue yourself and tell the emergency services what the hazard plates show (Rules 284 and 285).

First aid follows DR ABC: Danger, Response, Airway, Breathing, Circulation. If someone is not breathing normally, start CPR in the centre of the chest, pressing about 5 to 6 centimetres deep at about twice a second. An unconscious casualty who is breathing goes in the recovery position. Stem bleeding with firm pressure, but never pull out something stuck in a wound; pad around it instead. Cool a burn with clean, cool water for at least 20 minutes, cover it with cling film and leave anything stuck to it alone. Do not give a casualty anything to eat or drink.

The legal side is short but tested often. If you are involved in a collision that damages or injures another person, vehicle, animal or property, you MUST stop and give your details to anyone with reasonable grounds to ask. If you do not, you must report it to the police as soon as reasonably practicable and within 24 hours (Rule 286). If someone is injured and you do not show your insurance certificate at the time, you must report it within 24 hours and produce the certificate within seven days (Rule 287). If you break down on a level crossing, get everyone out and clear first, then call the signal operator (Rule 299).

Try 5 free questions

No account needed. Pick an answer to see whether it is right and why.

1 of 5

You are the first to arrive at a collision on a busy road. Nobody seems to be in immediate danger from fire. What should you do first?

The free questions with answers

  1. 1. You are the first to arrive at a collision on a busy road. Nobody seems to be in immediate danger from fire. What should you do first?

    Answer: Warn other traffic, for example with your hazard lights

    Further collisions are one of the main dangers after a crash, so deal with the danger first. Rule 283 says to use your hazard warning lights to warn other traffic, then call 999.

    Highway Code rule 283

  2. 2. A motorcyclist has been injured in a collision. They are conscious and breathing. What should you do about their helmet?

    Answer: Leave it on unless removing it is essential

    Rule 283 says do not remove a motorcyclist's helmet unless it is essential. Moving the head can make a neck or spine injury much worse.

    Highway Code rule 283

  3. 3. Your car breaks down on a two-way country road. How far behind it should you place a warning triangle?

    Answer: At least 45 metres

    Rule 276 says put a warning triangle on the road at least 45 metres (147 feet) behind your broken-down vehicle, on the same side of the road. Take great care placing and collecting it.

    Highway Code rule 276

  4. 4. Your car breaks down in a live lane on a motorway with no hard shoulder. You cannot reach the left lane and it is not safe to get out. What should you do?

    Answer: Stay in the car with your seat belt on and call 999

    Rule 277 says that if you cannot get to the left lane or a place of relative safety and exit safely, stay in your vehicle, keep your seat belt and hazard lights on, and call 999 for the police.

    Highway Code rule 277

  5. 5. An adult casualty is not breathing. You start CPR. How should you press on the centre of their chest?

    Answer: About 5 to 6 cm deep, about twice a second

    The Highway Code's first aid annex says to press down hard and fast, around 5 to 6 centimetres and about twice a second. Keep going until they start breathing or a medical professional takes over.

Questions people ask

How far behind my car should I put a warning triangle?
At least 45 metres (147 feet) behind it, on the same side of the road. Never use a warning triangle on a motorway, because walking along the carriageway to place it is too dangerous (Rule 276).
What should I do if I break down on a motorway with no hard shoulder?
Try to reach the next exit, a service area or an emergency area. If you are stuck in a live lane and cannot get out safely, stay in the car with your seat belt and hazard lights on and call 999 for the police (Rule 277).
Do I have to report a collision to the police?
If you did not give your name and address at the scene, yes, as soon as reasonably practicable and within 24 hours. If someone was injured and you did not show your insurance certificate, you must also produce it to the police within seven days.
What does DR ABC stand for in first aid?
Danger, Response, Airway, Breathing and Circulation. It is the order in which the Highway Code's first aid annex asks you to check a casualty.

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Rule references: The Highway Code (GOV.UK), Open Government Licence v3.0. Questions and explanations are written by PassRank and are not the official DVSA revision questions.