As has already been pointed out, big man, it's not just about surviving an accident, but avoiding an accident in the place, and that is more likely the faster you are travelling. How can you expect anybody driving at normal speeds to see a Veyron doing 400km/h coming up behind them? How far do you think the Veyron will have travelled by the time the driver even sees what is unfolding in front of them, has time to react, apply the brakes, and then bring the car to a much lower speed or take evasive action?