20mph after drinking during wet weather
You had been drinking alcohol, and so you hit the pedestrian. Even though you were driving at 20 mph, alcohol had slowed your reactions and increased your thinking distance. The wet road also increased your braking distance. This meant that you were not able to stop safely when the pedestrian stepped out unexpectedly.
- Thinking Distance
- Braking Distance
- Overall Stopping Distance
Injury: Yes, the car hit the pedestrian.
In this scenario, around one third of pedestrians would be injured, with a risk of that injury being serious.
- This accident would have been prevented if the driver had not been drink-driving. The driver took longer to spot and react to the pedestrian, because s/he was impaired by alcohol. This resulted in a longer thinking distance, which meant that it took longer to stop. Re-run the simulator, without selecting alcohol impairment, to see how the thinking distance is shorter, but note how the wet road still increases the braking distance.
- Using a mobile phone also increases the thinking distance as the driver takes longer to spot and react to the pedestrian. Re-run the simulator, and select mobile phone use instead of alcoholic impairment, to see how this changes the result.
- Wet weather increases braking distances. Re-run the simulator, and select dry weather, to see how this decreases the braking distance.