If you think the measure of driving rusk isn’t per km, then you have absolutely no idea what you’re talking about.

And just repeating things doesn’t make them different, up to 7.5 tones, it is the same speed and that is plenty enough different weight for stopping distance.

But then again, it is a useless conversation because you have no idea what road safety is about as you seem to focus on absolute numbers and the best way to get absolute 0 is to close all roads and ban driving.