This isn't really an insurance problem. As driverless cars take to the roads, the accident experience will gradually improve, which will be reflected in insurance rates. As and when they crash, the liability issues will be sorted out in the courts, and that isn't an insurance issue, except when case law changes. Speaking broadly, driverless cars won't really create new case law, though they will probably produce interesting corner cases. As for the original question, I'm sceptical that you will see events where a computer's choice would have such ramifications. It seems far more likely the computer saw it coming and glided to a stop 200m back.
*Oh, apparently they could. Er.
That said, personally I'll take a Collings over a 20s/30s Martin, but that's just me.
The most exciting phrase to hear in science, the one that heralds new discoveries, is not "Eureka!" (I found it!) but "That's funny ..." -- Isaac Asimov