I'm not sure if Truckers still use CB but on a cross country road trip which involved hours being pinned in the left most lane on all sides by trailers with speed governors set to 66mph I recall wishing I had had the ability to communicate with the drivers. It seems like this would be easy to implement from the factory as well, although I suppose giving everyone with a new car the abulity to speak their minds to others on the road with them would a.) be less safe b.) be super annoying.