You're being downvoted for the flippant and dismissive tone of your comment, but I do wonder how computer-driven cars will determine when it is acceptable to violate lane markings and road signs. Boston in winter is more than just traction control. There are snow piles that might be icy, ridges left from a plow, shifting conditions, and bad visibility. I suspect it IS a hard problem.

> And finding lane markers is one of the easiest tasks in self driving

It's not a matter of "finding" lane markers. There are no lane markers visible after it snows.

Lane markings are a fraction of the triangulation.

We ourselves identify and confirm other urban waymarks via captcha which feeds the nav data -- bridges, signs, hills, hydrants, chimneys, lights. There is mass live verification from android auto in vehicles. There are many yearly layers of street view images and scans.

Right, and what about rural waymarks? A highway in the middle of nowhere at night during a snowstorm?

I don't think we'll see a system that can handle that in my lifetime.