[bigyabai]

> So driver assistance technologies that help avoid running over some pedestrian are not represented.

So, represent them and then subtract the number of people "provably" saved by assistive driving from the number of road fatalities blamed on assistive tech. You can normalize for all of these things without too much trouble, the existence of airbags and roll cages doesn't make your claim impossible to prove.

That would give you a single, easily readable quotient that describes the cost-benefit analysis in human lives perfectly. It's probably not a positive number, but it would be useful to know all the same.