I listen to a CB when doing long distance auto travel - trucker conversations about road conditions is helpful. However, in the RV, there is no good place to mount the antenna so I don't have a radio there....but would like to. Fiberglass body means no ground plane. If on the roof, it would stick up pretty far and hit things. No good place to mount on our outside mirrors either.
With the real time traffic updates on our Garmin GPS, CB is less important when going through big cities now than it was before. Also crowd sourced apps, like Wayse on the Android phone, give us good information about traffic flow and hazards.