Tesla Autopilot
Watch this at 0.25x speed or slower to see what's going on. This is a carefully chosen environment. Every place it drives has very clear highway centerline markings. It seems to be highly dependent on those for guidance.  Sometimes it can't quite identify the road edge, but the centerline provides a position reference.The inputs seem to be road line recognition, optical flow for the road, and solid object recognition, all vision-driven.  Object recognition is limited. It doesn't recognize traffic cones as obstacles, either on the road centerline or on the road edge.  Nor does it seem to be aware of guard rails or bridge railings just outside the road edge.  It probably can't drive around an obstacle; we never see it do that in the video.This looks like lane following plus smart cruise control plus GPS-based route guidance. That's nice, but it's not good enough that you can go to sleep while it's driving.