[JumpCrisscross]

I think you mean SAE Level 3. SAE Level 2 is “lane centering” and “adaptive cruise control” [1]. (Level 3 is “when the feature requests, you must drive.)

[1] https://www.ncdd.com/images/blog/diagram.png

[Symmetry]

I meant to include both SAE 2 and 3. I think having both lane keeping and cruise control on at the same time will tend to cause people to lose focus in a way they wouldn't if they had to do one or the other.