You'd think that they'd drive extra cautiously in snow in that case.

> So when is the O(N) rate of growth going to get SDVs to the point of an attentive 16 year old?

Does it need to beat an attentive 16 year old or does it just need to beat a distracted early to mid 30s parent with a small child or two in the car? Self driving cars only need to be better than the average human to reduce overall accidents. Having said that, I'd probably be more likely to hop into a car driven by a random person than a self driving car that I know is only marginally better than an average human.