The graphic in that link is very helpful in describing the feature set by driving automation level. However, the green/blue color coding is misleading IMO. Th

The graphic in that link is very helpful in describing the feature set by driving automation level. However, the green/blue color coding is misleading IMO. That tiny blue box in Level 3 means that while you are technically not driving and can take your eyes off the road, you must be ready to start driving at any time. 10 seconds warning really is not a lot of time at highway speeds when you must unexpectedly context switch between whatever you were doing and driving. It seems to me that the real leap in ability occurs when going from Level 3 to Level 4, not Level 2 to Level 3. I also have a hunch that if/when we get to Level 4 we will end up with a bunch of sublevels (Level 4.1, 4.2, 4.n) that progressively expand the conditions under which the system will operate over a period of decades as we asymptotically approach Level 5.