But that's about all of the driving I'd want a car to do for me.
This sounds like a bad, bad idea.
I can't recall a time on any trip where there wasn't a plastic bag, flattened cardboard box, etc. that didn't blow in front of my car, or shoot out from under a semi I was following.
I wonder if those would activate these brakes, and if so, doing so on an interstated doing 75 or 80 would probably not be that fun...