Not here at Fedex, but a while back while waiting on another driver at an unscheduled meet I called road dispatch and was told my meet was at so-and-so location. OK, I figured the other driver had just called dispatch to let them know where he was. After waiting a while I again called dispatch to say my meet was still not here and dispatch said he's right around the corner, he's turning on to your street right now. Couldn't figure out how he could have known such precise information till I learned that our tractors had GPS and dispatch knew exactly where we were at any moment. Knowing that killed my plans for off-route adventures in the future!