It might have to do with the fact that more speed causes exponentially more damage and lethality. I don’t know the exact figures but something like hitting a pe

It might have to do with the fact that more speed causes exponentially more damage and lethality. I don’t know the exact figures but something like hitting a pedestrian at 40kmh they’d have 90% chance of survival and that goes down to 25% at 50kmh (I don’t know the exact numbers but that’s the idea) Maybe 45kmh was the best trade off between lethality and speed?