Key takeaways
- Highway Code rule 276 sets out the duties: get the vehicle off the road if you can, hazard lights, and a warning triangle at least 45 metres behind on ordinary roads.
- Obstructing the highway under the Highways Act requires the obstruction to be wilful, so a genuine breakdown is a defence to that offence.
- Leaving a vehicle in a dangerous position is a separate offence with no wilfulness requirement. Breaking down is not a defence to that one.
- The Highway Code attaches "except in an emergency" to motorways only, not to bus lanes, red routes or yellow lines.
A tyre goes somewhere with nowhere to pull in, and within about a minute there is a queue behind you. The instinct is to feel that you are doing something wrong, and to start making decisions quickly to stop being in the way. It is worth knowing what the law actually asks of you here, because it is more forgiving than it feels in the moment about the obstruction, and less forgiving than most people assume about everything else.
What does the Highway Code require when you break down?
Rule 276 sets it out, and it opens by telling you to think first of all other road users. In practice it asks for five things: get the vehicle off the road if you can, warn other traffic with hazard warning lights if you are causing an obstruction, wear light-coloured or fluorescent clothing, place a warning triangle on the road at least 45 metres behind the vehicle, and keep sidelights on in poor visibility or after dark.
Two qualifications matter more than the list. The warning triangle instruction applies to ordinary roads and never to a motorway carriageway. And the Code also tells you not to stand between your vehicle and oncoming traffic, which rules out most of the positions people naturally adopt while trying to wave others past.
Am I committing an offence by blocking the road?
Probably not by breaking down, and this is where the law is more reasonable than it feels. Section 137 of the Highways Act 1980 makes it an offence if a person "without lawful authority or excuse, in any way wilfully obstructs the free passage along a highway". The operative word is wilfully. A tyre failing is not a decision you made, so a genuine breakdown is not a wilful obstruction, and you also have a lawful excuse.
The offence that does not care about your intentions is a different one. Section 22 of the Road Traffic Act 1988 catches anyone who "causes or permits the vehicle to remain at rest on a road in such a position or in such condition or in such circumstances as to involve a danger of injury to other persons using the road". There is no wilfulness requirement in that wording. Breaking down is not a defence to leaving the car somewhere dangerous once you had the opportunity to improve matters.
| The problem | Does a genuine breakdown help you? |
|---|---|
| Wilful obstruction of the highway (Highways Act 1980 s.137) | Yes. The offence requires the obstruction to be wilful and without lawful excuse. |
| Leaving a vehicle in a dangerous position (Road Traffic Act 1988 s.22) | No. The wording covers causing or permitting the vehicle to remain at rest dangerously. |
| Highway Code rule 242, dangerous position or unnecessary obstruction | Partly. "Unnecessary" is doing work, but this is a MUST NOT rule backed by the offences above. |
| A parking or bus lane penalty charge | No. It is a civil matter decided without reference to your intentions. |
That last row is the one that surprises people, and it is covered properly in how a penalty charge challenge actually works. The short version is that the thing which excuses you from the criminal offence does nothing about the ticket.
Is there an emergency exception for bus lanes and yellow lines?
Not in the way most drivers believe. Highway Code rule 240 lists the places you must not stop or park, and the words "except in an emergency" appear attached to one specific item on that list: the carriageway, an emergency area or the hard shoulder of a motorway. They do not appear against the entries for clearways, red routes, yellow lines or tram and cycle lanes.
This is worth sitting with, because the assumption that an emergency licenses stopping anywhere is extremely widespread. On a motorway the Code explicitly contemplates emergencies. On an urban road it does not, which does not make stopping unlawful when you genuinely cannot go on, but it does mean there is no written exception to point at afterwards.
Should you push the car out of the way?
There is no official answer for ordinary roads, and I would rather tell you that than invent one. I went looking for a government, National Highways or police statement on whether to push a broken-down car clear of a live lane and could not find one that applies off the motorway network. The Highway Code says to get the vehicle off the road "if possible" and does not describe how.
What the Code does say bears on the decision. It tells you not to stand between your vehicle and oncoming traffic, which is precisely where you end up when pushing a car forwards from behind on a road with traffic coming towards you. So the reasonable reading is:
- On a motorway or fast dual carriageway, do not push it. Get out on the side away from traffic, get behind the barrier, and call for help.
- On a quiet road, with people to help and clear sightlines, moving a car a few metres into a gap is an ordinary thing to do and the Code's "if possible" contemplates it.
- On a busy urban road, on a bend, or over a crest, the sightline is the thing that decides it. If drivers cannot see you until they are close, do not put people in the road.
- Never push with someone steering from outside the car, and never with a passenger left inside who could not get out quickly.
Remember also that a car with a flat tyre pushes very differently from one with four inflated ones, and that rolling any distance on a deflated tyre will finish it and can damage the wheel. That is a reason to move a short distance to safety and no further.
What to do while you are waiting
Once the car is as safe as it is going to get, the useful jobs are small ones. Hazard lights on. Triangle out at a proper distance if the road allows it. Everyone out and off the carriageway if it is fast, or in the car with belts on if getting out would be worse. Then make the call, and be specific about the fact that you are causing an obstruction, because it changes how the job is prioritised.
If the car is somewhere it plainly cannot stay, say that too. There is a real difference between a car on a quiet residential street and a car half in a running lane, and nobody can weigh that if you do not mention it.
Tell us you are causing an obstruction when you call and we will factor it in. We bring the tyre and fit it where the car is standing, which is usually quicker than getting recovered somewhere else first. Typically 30 to 60 minutes across London and the nearer Home Counties, longer further out, and you get a real arrival time.
If you are on a motorway, the sequence there is different and comes first. On a red route in London, this covers that specific case, and describing where you are is what gets help to you fastest.
Frequently asked questions
Obstructing the highway under the Highways Act 1980 requires the obstruction to be wilful and without lawful excuse, so a genuine breakdown is a defence to that offence. Leaving the vehicle in a dangerous position is a separate offence that does not require wilfulness.
At least 45 metres, around 147 feet, behind the vehicle on ordinary roads. That is roughly eleven car lengths and considerably further than most people place one. Never put a triangle out on a motorway carriageway.
The Highway Code attaches the words "except in an emergency" only to the motorway carriageway, hard shoulder and emergency area. There is no written emergency exception for bus lanes, red routes, yellow lines or clearways, so expect enforcement and deal with it afterwards.
There is no official guidance for ordinary roads. Never on a motorway or fast dual carriageway. On a quiet road with clear sightlines and enough people it is reasonable to move a short distance, bearing in mind the Code tells you not to stand between your vehicle and oncoming traffic.
Say when you call that the vehicle is causing an obstruction, because it affects how the job is prioritised and what is sent. Fitting at the car is usually quicker than being recovered elsewhere first, since the tyre travels to the vehicle.
Yes, because a penalty charge is a civil matter decided on whether the contravention happened, not on why. Breakdown is not one of the statutory grounds for representations, though it can be raised as a compelling reason for the authority to use its discretion.