Well, I really derailed this thread didn't I?
Sorry folks.
But it does highlight the problems the robotrucks would face off the interstates and why they're best for long distance hauling. And why the original concept for automated vehicles still has a role to play: wired roads, like slot racing cars. But with buried cables down the centerlines. Or maybe partitioned roads.
The less the robots have to deal with humans, the better for everybody.