Hey BillD,
Up here in N. New Hampshire I have a 45 mile commute and 35 of that is on the Interstate. I might see maybe 5 vehicles in that 35 miles.....so lots of room and road to let it run.....but it's not flat like Kansas up here, so it's hard to keep that speed up before you feel your running out of Interstate.
There are a couple of sections of rising 2 mile straights that I usually let it fly up to 175 every day........if the road is empty, which is 99% of the time.
Up here I got a better chance of seeing a Moose than a Trooper!
But just in case I'm planning on getting a Laser jammer next!