I had a CB in my old tow vehicle and should install it in my new - just have not gotten around to researching the specifics where to mount, where to run the wire, where to mounnt antenna, etc.
Around here in GA, I've not found much traffic on CB in early mornings, but would sometimes pick up around lunch time. I believe many use SSB these days which mine didn't have.
There was the occasional foul language but most often, it was just 'normal' conversations - alot of local drivers and some OTR drivers. And, frequently, I'd pick up skip from all over - California, Wisconsin, Pennsylvania, Alabama, even picked up a one sided conversation from one of the islands in the Bahamas. Most times I couldn't talk back but could hear full conversations. The furthest conversation I had was with someone 30-40 miles as the crow flies (nice chat about trout fishing in north GA).
It was useful for traffic (specifically when it comes to identifying which lane was blocked). Most of the conversations I was involved was related to which exit had travel plazas or when was the best time to drive through Atlanta as to avoid the majority of the traffic.
I did have a couple conversations about where Cabela's was located when it first opened :D
For me, it was more of the joy of conversation and helpfulness then learning about accidents/speed traps.