What is the stopping distance at 40 mph?

What is the stopping distance at 40 mph?

• A. 12 metres
• B. 36 metres
• C. 53 metres
• D. 23 metres

Answer: (B)

Stopping distance is made up of two parts: thinking distance (how far you travel while you react) plus braking distance (how far you travel while coming to a stop). At 40 mph, a typical thinking distance is about 12 metres, and the braking distance is around 24 metres. Add them together and you get roughly 36 metres in normal dry conditions. If the road is wet or icy, it would be longer. The other figures correspond to different parts or speeds: 12 metres would be just the thinking distance, 23 metres is the total stopping distance for a lower speed (around 30 mph), and 53 metres aligns with a higher speed (around 50 mph).

Stopping distance is made up of two parts: thinking distance (how far you travel while you react) plus braking distance (how far you travel while coming to a stop). At 40 mph, a typical thinking distance is about 12 metres, and the braking distance is around 24 metres. Add them together and you get roughly 36 metres in normal dry conditions. If the road is wet or icy, it would be longer. The other figures correspond to different parts or speeds: 12 metres would be just the thinking distance, 23 metres is the total stopping distance for a lower speed (around 30 mph), and 53 metres aligns with a higher speed (around 50 mph).