Breaking down is one of those things you hope never happens, but knowing exactly what to do turns a scary moment into a manageable one. The single biggest idea to hold onto is this: on a motorway, you and your passengers are far safer standing behind the barrier than sitting in a vehicle on the hard shoulder. Fast-moving traffic just feet away makes the car a dangerous place to wait.
The right response depends a lot on where you are. On an ordinary road you have more options, including placing a warning triangle to alert other drivers. On a motorway the rules tighten right up, because the speeds are higher and the margins for error are tiny. Learning both sets of steps now means you will not have to think them up under pressure later.
This guide walks you through both scenarios in plain, practical terms. We will cover what to switch on, where to stand, who to call, and the special situation of a smart motorway with no hard shoulder. Get these habits into your head and you will handle a breakdown calmly and safely.
Study time
28 min
Level
Advanced
Confidence
+10%
Practice
15 Qs
What you'll be able to do
- Understand exactly what to do, and in what order, if you're first to arrive at a crash.
- Understand the simple, safe things you can do for an injured person until help arrives.
- Understand what to do if you break down — and the one place you must never use a warning triangle.
The facts that matter
- On any road, put your hazard warning lights on straight away so others can see something is wrong.
- On an ordinary road you can place a warning triangle at least 45 metres (147 feet) behind the vehicle on the same side — but NEVER on a motorway.
- On a motorway, pull onto the hard shoulder or an emergency refuge area, stop as far left as possible, and put on your hazards.
- Get out of the LEFT-hand doors and wait behind the safety barrier, away from traffic — not in the car. Leave animals in the vehicle.
- Use an emergency roadside telephone if there is one (marker posts point to the nearest); it tells the operator your location. Then call your breakdown provider or National Highways.
- On a smart motorway with no hard shoulder where you cannot reach an emergency area and cannot safely get out, keep your seatbelt and hazards on and call 999. A red X above a lane means it is closed.
Make it stick
Memory anchors
Left, out, behind
On a motorway remember three words: LEFT (stop as far left as you can and get out of the left-hand doors), OUT (get everyone out of the vehicle), BEHIND (wait behind the safety barrier). Say it to yourself now so it comes automatically later.
Triangle: ordinary yes, motorway no
A warning triangle goes 45 metres behind you on an ordinary road, but stays in the boot on a motorway. Picture the triangle with a big red X through it every time you think of the motorway — placing it would mean walking into 70 mph traffic.
Stay sharp
The mistakes everyone makes
Staying in the car on the hard shoulder
Many people instinctively sit tight and wait for help inside the vehicle. On a motorway this is one of the most dangerous things you can do, because a car on the hard shoulder can be struck by traffic. Get out of the left-hand doors and wait behind the barrier every time.
Using a warning triangle on the motorway
Drivers sometimes carry the ordinary-road habit onto the motorway and try to set up a triangle. Retrieving and placing it means walking along the hard shoulder into fast traffic — far too risky. The triangle is for ordinary roads only.
Bringing pets and belongings out with you
In the rush people try to grab the dog, the shopping or a coffee. Leave animals in the vehicle — a frightened pet loose near a motorway is a serious hazard — and leave anything non-essential behind. Get people out and behind the barrier first.
Out on the road
What this looks like in real life
A flat tyre on the M6
Priya feels the steering pull and hears a rhythmic thumping. She flicks on her hazards, eases onto the hard shoulder and stops as far left as she can with the wheels turned left. She gets her two passengers out through the left-hand doors, pulls on her hi-vis jacket, and they climb up behind the barrier. She checks the nearest marker post, calls her breakdown provider with the location, and they wait safely up the bank until the recovery truck arrives. At no point does she touch the tyre herself on the traffic side.
Stuck in lane on a smart motorway
Tom's engine loses power on a smart motorway stretch with no hard shoulder, and he cannot coast to the next emergency area. Traffic is heavy and stepping out would be lethal, so he stays put. He keeps his seatbelt fastened and hazards flashing and dials 999 to report his exact location using the marker posts. Moments later a red X appears on the gantry above his lane, closing it to protect him. He stays calm inside the vehicle until National Highways reach him.
Quick answers
Frequently asked questions
Should I get out of the car if I break down on the motorway?
Yes — as long as it is safe to do so. Stop as far to the left as possible, get everyone out through the left-hand doors, and wait behind the safety barrier away from traffic, not in the vehicle. The only exception is if you cannot safely leave the car (for example on a smart motorway stuck in a live lane), in which case keep your seatbelt and hazards on and call 999.
Where do I put a warning triangle?
On an ordinary road, place it at least 45 metres (147 feet) behind your vehicle on the same side of the road, walking back carefully while facing oncoming traffic. Never use a warning triangle on a motorway — retrieving and placing it would put you in the path of fast-moving traffic on the hard shoulder.
What do I do about my dog or other pets?
Leave animals inside the vehicle. A frightened pet loose near a motorway is extremely dangerous, both for the animal and for other road users. Only remove a pet in a genuine emergency, and even then keep it under close control well away from the traffic.
How do I get help if I don't have signal?
Look for an emergency roadside telephone — the marker posts along the verge point to the nearest one, and it tells the operator exactly where you are automatically. If you use a mobile, read the number on the nearest marker post so you can give your location, then contact your breakdown provider or National Highways. If you are stuck and cannot get to safety, call 999.
Turn breaking down into marks
Reading builds understanding — practice makes it stick. Pick up where this guide leaves off, free.
Revision checklist
0/6Tick each point once you can explain it without looking.