The safety guy at the DC I use to work at would catch drivers from time to time. But he would just tell them they wasn't supposed to have the phone in there hand texting. Or they wasn't supposed to be talking and driving. But most drivers would tell him they were talking to the ROC. It never went any further than that.
But this was before all the other rules came into play. Me my self wouldn't go fast enough on the yard to kick me onto the drive line. But I only talked while truck was parked.
Not sure how it is now. I talk to former co-workers here and there. And 2 say they would leave if they could find a company paying the same or close to it. And I always say your not looking hard enough.