> What about when you erase all the lines on the road? What about when you remove the road? Both of those conditions can be handled by human drivers...a "self-

> What about when you erase all the lines on the road? What about when you remove the road? Both of those conditions can be handled by human drivers...a "self-driving" car had better at least handle them safely (e.g., alert the driver and then disengage autopilot), even if it can't actually navigate under the circumstances. Not always, at least not well -- I had a car drift into the side of my car in the rain when the lane markers were nearly invisible and the seams in the road made it seem like his lane was moving into my lane.