Puncture on the motorway: what to do, step by step

A puncture at motorway speed gives you a bang, a shudder through the steering, and a few seconds to make the right calls. Motorways are the safest roads in Britain when they're moving — but stopping on one is genuinely dangerous, and the rules about where and how to stop are different from an ordinary A-road. Follow the sequence below and you'll be off the carriageway, safe, and back on the road far faster than you'd expect.

1. Bring the car to a stop — smoothly

Don't brake hard. Ease off the accelerator, hold the wheel firmly with both hands, and let the car scrub speed naturally. Turn on your hazard lights immediately so traffic behind knows something is wrong. Your first choice should always be to leave the motorway: aim for the next junction or a motorway service area, even if it means a slow, careful mile or two on a deflating tyre. You'll wreck the tyre, but you may save the wheel — and you'll be somewhere safe and lit.

2. If you can't get off: know your motorway type

• Traditional motorway with a hard shoulder: pull onto the hard shoulder as far left as you can, wheels turned left, hazards on.
• Smart motorway with emergency refuge areas (ERAs): aim for the next blue ERA — they're spaced along the carriageway, typically up to 1.5 miles apart. Stop with your wheels within the white-lined box.
• Smart motorway, no ERA in reach, can't reach a junction: stop as far over to the left as possible in your lane, hazards on, and follow the live-lane advice below.

3. Stopped in a live lane? Stay in the car and call 999

If you've had to stop in a running lane with traffic passing close by, do not get out. Keep your seatbelt on, hazard lights on, and dial 999 straight away — that's the official National Highways advice for a broken-down vehicle in a live lane. They'll close the lane and send help. Getting out into live traffic is the single most dangerous thing you can do on a motorway.

4. On the hard shoulder or in an ERA: get out, left side

• Exit through the left-hand (passenger side) door, and get children out through the left too.
• Put on a hi-vis vest if you have one, then get everyone well behind the barrier or up the embankment — never stand in front of or behind the car.
• On the hard shoulder or an ERA, use the orange emergency roadside phone where there is one: it's free, needs no signal, and connects straight to National Highways, who will know exactly where you are. Otherwise call 999.
• Leave a note or ring the police if you walk away from the vehicle, and never try to cross the carriageway on foot.

5. Don't change the wheel yourself

Even on a traditional hard shoulder, neither National Highways nor the main breakdown organisations recommend fitting a spare on the motorway. Jacking a car up inches from 70mph traffic is how people get hurt — it's simply not worth it to save a callout. Wait behind the barrier and let help come to you. If you do want to reach a service area instead, and the tyre still holds air, it's often safer to creep there slowly than to work at the roadside.

6. Repair or replace? What motorway punctures usually need

A puncture at speed is harder on the tyre than a slow leak on a town street. Anything driven on while fully flat usually can't be repaired to the British Standard (BS AU 159), and sidewall damage from a blowout always means a replacement. Run-flat tyres can carry you to safety by design, but they're normally replaced rather than repaired after a motorway failure. The practical upshot: expect a new tyre, and expect to be asked for the size off the sidewall.

7. How a mobile tyre fitter fits into this

Once you're safe — at a service area, an ERA, a lay-by, or after the lane has been cleared — a 24-hour mobile tyre fitter can come to you with the correct tyre on board, fit and balance it on the spot, and take the old one away. No recovery truck, no garage waiting room at midnight. Have the tyre size, your make and model, and your exact location (What3Words works well on motorways) ready when you call.