> This report covers disengagements following the California DMV definition, which means "a deactivation of the autonomous mode when a failure of the autonomous

> This report covers disengagements following the California DMV definition, which means "a deactivation of the autonomous mode when a failure of the autonomous technology is detected or when the safe operation of the vehicle requires that the autonomous vehicle test driver disengage the autonomous mode and take immediate manual control of the vehicle.” So, you're right, there's no clear distinction, but I would further argue that it doesn't matter. Even if only 1/1000 disengagements are fatal, my conclusion remains the same. I think we're splitting hairs at this point, though. Even if not fatal, I highly doubt a significant fraction of such events (as defined above) would allow me take a nap upon departure and wake up at my destination, so it would still be unacceptable to me. I guess we have to agree on what an acceptable end-game is for fully autonomous vehicles. If you think "waking up on the shoulder exchanging insurance" is acceptable, then that would indeed change the numbers (but by how much? Two, maybe four orders of magnitude?). Humans get into fender-benders all the time, but surely we'd strive to eradicate this inefficiency in the automated driver. I think this is still an active area of debate; some assembly-line work can be made more efficient with machines, but we've seen humans out-perform machines in other types of work. I think driving tends to utilize more reactive, intuitive "System 1" thinking[0], so I imagine that humans will be vastly better than machines at driving for a very long time. [0] https://en.wikipedia.org/wiki/Thinking,_Fast_and_Slow https://en.wikipedia.org/wiki/Thinking,_Fast_and_Slow