It's also possible he drives for one of the many companies that got tired of being held responsible for their drivers having illegal equipment in the cab and they banned all radios in their vehicles. Responsible ham drivers didn't like it much but obey company rules or you're out on your butt. Drivers for companies that banned all connections to the electrical system liked losing their refrigerators and like equipment even less but that's the way it goes. I'm pretty sure you've heard it called Children's Band, unfortunately they all got spanked because of a few brats that wouldn't behave themselves. (:-<)