[totalZero]

I agree. By establishing an "auto-pilot," you actually eliminate redundancy by putting the driver in a passive position. (No matter how many times you tell the driver to remain attentive)

The machine ought to be an error handler for specific failures of an active human driver (sudden braking of lead vehicle, lane straying, etc). This is the only way to get both machine and human to pay full attention. A person in a co-pilot role will struggle to react quickly enough to handle errors of the machine auto-pilot.