DVSA Speed and Stopping Distances 4

Question 1

What is the overall stopping distance at 60 mph?

Accepted Answer

73 metres (240 feet)

Answer

At 60 mph, the overall stopping distance is approximately 73 metres (240 feet) — about 18 car lengths. This comprises 18 metres thinking distance and 55 metres braking distance.

Question 2

On an icy road, by how much can stopping distance increase?

Accepted Answer

Up to 10 times

Answer

On icy roads, stopping distances can increase up to 10 times the normal distance. At 30 mph, instead of 23 metres you could need up to 230 metres to stop. Reduce speed dramatically, use the highest gear possible, and brake very gently.

Question 3

How does vehicle weight affect braking distance?

Accepted Answer

Heavier vehicles have longer braking distances because more kinetic energy must be dissipated

Answer

A heavier vehicle carries more kinetic energy at any given speed, requiring more braking force and distance to stop. This is why fully loaded vehicles, caravans, and cars with heavy loads need extra following distance. Ensure your load is secure and adjust your driving accordingly.

Question 4

What speed corresponds to approximately 96 metres (315 feet) overall stopping distance?

Accepted Answer

70 mph

Answer

70 mph has an overall stopping distance of approximately 96 metres (315 feet). This is the national speed limit on motorways and dual carriageways, and at this speed you need almost the length of a football pitch to stop.

Question 5

How does an underinflated tyre affect stopping distance?

Accepted Answer

It can increase stopping distance due to poor tyre contact and overheating

Answer

Underinflated tyres have a larger, distorted contact patch that does not grip the road efficiently. They overheat, wear unevenly, and respond poorly to braking and steering. This increases stopping distances and makes the vehicle harder to control. Check tyre pressures regularly when cold.

DVSA UK Driving Theory Practice Test

DVSA UK Driving Theory Practice Test

DVSA Speed and Stopping Distances 4