Agreed, but I don't think it needs to be perfect to be useful enough to be mandated. I would suggest a mechanism whereby a car would be able to identify whether

Agreed, but I don't think it needs to be perfect to be useful enough to be mandated. I would suggest a mechanism whereby a car would be able to identify whether its driver is no longer in proper control of the vehicle (e.g. asleep) and then assess the road conditions, and if it isn't confident in its ability to continue self-driving to the designated destination, it would self-drive into a safe stop. I think that on its own could massively reduce road accidents