[dsfyu404ed]

> If the operator might have to take control in tricky situations, they can't be sleeping the rest of the time.

A tricky situation for a computer is often not a tricky situation for a human. 99% of it will be the AI getting confused by things that are simple for humans (e.g interpreting detour signs).

[notatoad]

that doesn't change my point though: regardless of how easy it is for a human to respond to, they can't respond if they're sleeping.