Stopping Distances

20mph while using a phone during dry weather

You were using a mobile phone, and so you hit the pedestrian. Even though you were driving at 20 mph, using a mobile phone distracted you and increased your thinking distance. This meant that you were not able to stop safely when the pedestrian stepped out unexpectedly.

Thinking Distance
13m
Braking Distance
6m
Overall Stopping Distance
19m

Injury: Yes, the car hit the pedestrian.

In this scenario, it is likely that half of the pedestrians hit would be injured, and 1 in 10 would be seriously injured or hospitalised.

Suggested Comparisons

  1. This accident would have been prevented if the driver had not been using a mobile phone. The driver took longer to spot and react to the pedestrian, because s/he was distracted by the mobile phone. This resulted in a longer thinking distance, which meant that it took longer to stop. Re-run the simulator, without selecting mobile phone use, to see how the thinking distance is reduced, and how this changes the result.
  2. Drinking alcohol also increases the thinking distance meaning that the driver takes longer to spot and react to the pedestrian. Re-run the simulator, and select alcoholic impairment instead of mobile phone use, to see how this changes the result.
  3. Wet weather increases braking distances. Re-run the simulator, and select wet weather, to see how much the braking distance is increased and how this changes the result.

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