Both motorhomes we've owned had/have a CB radio. I find it very convenient checking traffic during construction zones or accidents. The 'drivers' will usually let you know which lane to be in.
Our first CB was the 'all-in-one' type unit. I found it hard to control as the buttons seemed a little awkward. The new coach has the old style CB where the unit is located to the right of my seat at the floor. The handheld microphone is smaller than the previous and much lighter and easier to control.
Sometimes the language can get rather salty but most the time it either informative during slowing traffic or quiet as a mouse.
MM.