How do they solve the problem?
My guess is, they randomly chose who to run over in the heat of the moment.
Why isn't that a viable solution?
If AI drivers generally have less accidents and in the few cases left behave like humans, wouldn't that be a win?
A workaround thus far has been to abstract the problem into small enough pieces that ARE palatable to sign off on, as your comment shows. "Minimize the number of Grandmas run over" is a different framing than "Should we run over Grandma?".
Do self-driving engineers personally commit to be punished and suffer remorse for their algorithm’s choices? And before you say “it’s not fair, the CEO is at fault!” think about who’s writing the code. The CEO doesn’t make the self-driving car possible, the engineer does.
Yes. I think that's a big part of why it's not necessary to "completely, once and for all solve" ethical problems to automate things that might run into them. One could easily argue (and people of course have) that it's also immoral not to take measures that will reduce accidents, which I'm quite sure will happen with AI drivers in the not too distant future.