A couple of years ago, 3 of us were returning from a det up north and pushing to get home by a reasonable time. Called MT to inform them we would be later than expected and that we would sign the vehicle in the following morning. They asked who was driving, thought nothing of it and gave them the correct answer, turns out we were doing 80+ and they could see it on the tracker!
One young student was logged driving an MT vehicle, his average speed was 90+, he was banned from driving MT and had to give a brief on the MT tracking system at the next wing brief!