Why stopping distances matter so much
Stopping distances are one of the cleanest scoring areas in the theory test. The figures are fixed, the pattern is learnable, and once you understand the link between speed, thinking distance and braking distance, these questions should become marks you expect to get rather than marks you hope for.
Best revision styleShort repetition beats one long cram session
Most missed pointTotal stopping distance includes thinking and braking distance
Fastest winLearn the normal-road figures first, then compare wet and icy roads
Normal stopping distances to know
| Speed | Thinking distance | Braking distance | Total stopping distance |
|---|
| 20 mph | 6 m | 6 m | 12 metres |
| 30 mph | 9 m | 14 m | 23 metres |
| 40 mph | 12 m | 24 m | 36 metres |
| 50 mph | 15 m | 38 m | 53 metres |
| 60 mph | 18 m | 55 m | 73 metres |
| 70 mph | 21 m | 75 m | 96 metres |
Get these figures solid first. Once you can recall them quickly, the rest of the topic becomes much easier because you are not trying to reason from scratch every time.
What changes stopping distance?
Total stopping distance is made up of thinking distance and braking distance. Speed, tiredness, alcohol, distractions, wet roads, icy roads, poor tyres and worn brakes can all push that distance out. So the theory test is not only checking whether you know the figures — it is checking whether you understand what can make safe space disappear faster than expected.
Ready to test yourself?
Use focused stopping distances practice first, then move into a full mock to check that the figures still come back instantly when you are under pressure and switching between different topics.
Do I need to memorise stopping distances exactly?
Yes. This is one of the clearest theory test memory topics, so exact recall matters.
What affects stopping distance most?
Speed, tyre grip, weather, road surface, braking force and your own reaction time all affect the final distance.
What is the best way to revise stopping distances?
Learn the six normal-road figures first, then use short practice bursts and timed mocks to keep them sharp.
