Both of our RV's came with CB's.... I use it to check on traffic, especially, when we are stopped. It has come in handy just for that purpose many times. The speaker for the CB is on the pillar right next to my left ear so I don't have to turn it up very loud (we can still hear the radio).
We have a built-in Passport radar detector that picks up several radar bands. It also warns me of 'photo' intersections. Interesting little gadget.
Most of the time the 'driver's' don't talk much. We can go for 100's of miles and not hear a peep.
MM.