Study topic
Stopping distances in the UK
Stopping distances are a key area of the theory test. The Highway Code typical shortest stopping distances are frequently tested, so it pays to learn the numbers and the pattern behind them.
Key facts to remember
- ◆ Overall stopping distance = thinking distance + braking distance.
- ◆ At 20 mph: 12 metres (3 car lengths).
- ◆ At 30 mph: 23 metres (6 car lengths).
- ◆ At 40 mph: 36 metres (9 car lengths).
- ◆ At 50 mph: 53 metres (13 car lengths).
- ◆ At 60 mph: 73 metres (18 car lengths).
- ◆ At 70 mph: 96 metres (24 car lengths).
These figures are for a dry road and an alert driver. Wet roads can double braking distances; icy roads can multiply them by ten. Use the two-second rule for a safe gap in good conditions, and at least four seconds in the wet.