It's too early to know who is to blame, or even if blame can be assigned so cleanly. Meanwhile, we have Uber's own reports that say that human drivers have to physically intervene during autonomous operation at a rate of one intervention per mile http://www.recode.net/2017/3/16/14938116/uber-travis-kalanic...

Uber is pretty middle of the pack as far as the state of their progress developing this technology is concerned. One intervention per mile on average isn't any kind of scathing indictment of Uber's autonomous driving program. The sensationalism of Uber's leaked intervention report mostly just illustrates a disconnect between public perception about where the technology is at, and where it's really at.

There are 23 other companies with permits to test autonomous vehicles in CA and they're all doing pretty much the same thing. Waymo is way out in front, Cruise/GM is doing well, but there are maybe a half dozen large, deeply invested players (including Tesla) not nearly as advanced as Uber.

It's possible, of course, that Uber was the victim of nasty coincidence. But bad accidents like this are rare. Most people go many hundreds of thousands of miles between rollover collisions or other equally severe accidents. Uber's self driving car program in Arizona is only a couple of months old. It's not a bad presumption that this is not purely fate.

Yes. It's entirely possible that the other driver was 100% to blame but a rollover accident is actually a very serious accident even if there were apparently no serious injuries in this case. This wasn't some happens all the time fender bender.