This is also an issue for other autonomous systems where there's a human in the loop. The solution for that is well known: dial down the automation every once i

This is also an issue for other autonomous systems where there's a human in the loop. The solution for that is well known: dial down the automation every once in a while and ask the human to do something, so that they stay aware of their surroundings and don't doze off. Unfortunately, a car that turns off the cruise control, asks you to recenter the car in the lane or increase the distance with the car ahead wouldn't sell that well, as people would consider it defective.