Stopping Distance in Sweden: Reaction Distance and Braking Distance Explained
Stopping distance is easier when you split it into two parts: the distance travelled before braking begins and the distance travelled while the car is actually braking. Speed affects both.
Quick answer
Stopping distance = reaction distance + braking distance. Trafikverket’s good-condition examples give about 17 m at 30 km/h, 35 m at 50 km/h, 56 m at 70 km/h and 97 m at 100 km/h. These are illustrations, not fixed legal distances for every road and car.
The most important lesson is not a single formula. It is that stopping distance grows rapidly as speed increases, and that road grip, tyre condition, weather, visibility and driver reaction can make the real distance much longer.
Watch: Stopping Distance at 50 km/h
See a quick Trafikverket-based stopping-distance example, then continue below to understand reaction distance, braking distance and road conditions.
Continue below for the full explanation, examples and official-source references.
Reaction distance and braking distance
Reaction distance is the distance the vehicle travels while the driver detects the hazard, understands it and begins to brake. It depends on speed and the driver’s reaction time.
Braking distance begins when effective braking starts and ends when the vehicle stops. It is strongly affected by speed, road grip, tyres, brakes and how firmly the vehicle is braked.
Add the two together and you get the stopping distance.
Trafikverket stopping-distance examples
Trafikverket publishes illustrative stopping distances for good tyres, good road surface and good weather conditions. They show how quickly the total distance grows with speed.
| Speed | Illustrative stopping distance |
|---|---|
| 30 km/h | about 17 m |
| 40 km/h | about 25 m |
| 50 km/h | about 35 m |
| 60 km/h | about 45 m |
| 70 km/h | about 56 m |
| 80 km/h | about 69 m |
| 90 km/h | about 82 m |
| 100 km/h | about 97 m |
Use these values to understand the relationship, not as a promise that every car will stop in exactly that distance. Trafikverket notes that worn tyres and ice can make the stopping distance significantly longer.
Why a small speed increase can matter so much
Reaction distance rises roughly in proportion to speed if reaction time stays the same: at a higher speed, the car covers more metres during every second before braking starts.
Braking distance grows even more sharply because the vehicle has much more kinetic energy at higher speed. This is why increasing speed from 50 to 100 km/h does not merely double a typical braking distance.
Safety meaning: speed changes both whether you can stop before the hazard and how fast you are still travelling if you hit it.
What makes stopping distance longer?
- Higher speed.
- Longer driver reaction time because of distraction, tiredness or poor attention.
- Snow, ice, slush, water or loose material on the road.
- Worn or unsuitable tyres.
- Poor brake condition.
- A heavily loaded vehicle or other conditions affecting vehicle behaviour.
- Reduced visibility that makes the hazard visible later.
Swedish speed rules require you to adapt speed to road, weather, visibility, vehicle condition/load and traffic conditions, and to drive at a speed that allows you to remain in control and stop within the visible road ahead.
Stopping distance in Swedish winter conditions
The official Trafikverket examples above assume good conditions. On ice, the braking part can become dramatically longer, and abrupt braking or steering can also cause loss of control.
That is why winter safety depends on creating the margin before you need it: reduce speed, increase following distance and plan braking earlier. Read our winter driving rules in Sweden guide for tyre dates and grip rules.
How to think about stopping-distance questions
For theory preparation, separate the problem into three questions:
- What affects the driver’s reaction before braking?
- What affects the car’s braking after the brakes are applied?
- How did the speed or road condition change?
If the question gives an exact study formula, use the method specified by the learning material. But do not confuse a classroom approximation with a legal guarantee of stopping distance. In real driving, conditions vary.
Practise the wider speed topic with our speed limits in Sweden guide and explained theory questions.
Related guides and practice
Use these pages to connect the rule to the rest of your Swedish driving-licence preparation.
Frequently asked questions
What is stopping distance?
Stopping distance is the reaction distance plus the braking distance.
What is reaction distance?
It is the distance travelled while the driver detects and reacts to a hazard before effective braking begins.
What is braking distance?
It is the distance travelled from the start of effective braking until the vehicle comes to a stop.
What stopping distance does Trafikverket show at 50 km/h?
Trafikverket’s illustration for good tyres, good road surface and good weather shows about 35 metres at 50 km/h.
Does ice increase stopping distance?
Yes. Trafikverket specifically notes that ice and worn tyres can make the stopping distance significantly longer.
Official sources
Rules and test procedures can change. The explanations on this page were reviewed against the official sources below on 30 August 2026.
Understand the distance, not only the formula
Good theory preparation connects reaction time, speed, grip and braking so you can use the knowledge in real traffic as well as on the test.