We are already there if this happens to a human driver. Cars are really dangerous - one in three car deaths in the US involves alcohol. Cars don’t drink alcohol, people do. There is much room to improve self driving cars, but eventually they will kill less and yes, we have to accept that they never will kill zero, because life is too complicated and ultimately humans are pretty stupid.

There's no point in even having the debate, since it's not how self driving cars work in the first place. People always do this crap "How can we let an Ai determine who lives or dies?!"

The car won't decide crap, it will obey the traffic laws and that's it. If someone steps out in front of it, it will try to brake and evade as much as it can without leaving it's lane. If it can't, it will hit the person that's in the road, that's it.

There isn't some big conspiracy on how it will evaluate if a teenager is more valuable than an old woman, it's just "Car will try to stop if it can, and run over the person in the way if it can't"