CB's are in common use by wheelers. If you mean do people still use them on the highway. Yes most pro drivers mostly still have a CB, but the constant chatter and the goofy lingo from the 70's are mostly gone. Pros mostly use the radio as a tool and not for emtertainment. No doubt due to the other in cab distractions available. cell phone, ipod, sat. radio. Last summer i drove from CO. to NC. and back. the CB was on the whole way. sometimes I would drive 3-4 hours without hearing a word. But when ever I keyed the mike to ask a qustion the anwsers came right back. Drivers are listening, there isn't much dialog.
"If a law is stupid, you have to break it."