As I said earlier, the speed limit out here (Utah, Idaho, Wyoming, Montana) is 75 mph for automobiles and 65 mph for trucks, vehicles towing things, and so on. On the Interstates, off them it's 10 mph lower. However...if you do the speed limit you will be run over and possibly ticketed for obstructing traffic (especially around Salt Lake City, which has the worst drivers I've ever encountered). 80 to 82 mph is acceptable and will keep you up with most of the traffic, although there are FUDs who go 95 to 100 mph. FUDs get tickets, too -- the cops are now using Chargers with interior LED light bars. If you're driving way too fast in Idaho and there's what appears to be a black car ahead of you and it's doing about the speed limit, don't go whipping on past because as you pass it you might just notice the words "Idaho State Police" just before s/he turns on the siren and the red&blues.

Run away and they'll call in the local sheriff and the local cops and you will NOT find the results enjoyable. It's been tried -- the cops will use "spike sticks" to flatten your tires first, and if you persist they'll herd you into a cul-de-sac and you'll produce your license (if any) at gunpoint.

Last year a guy tried just what I've described and the cops reacted as described. Only the speeder then decided to ram a police car out of the way. Don't do that, either. The police really, really hate all the paperwork you will cause them in your failure. The lad who did it is now serving a term, but not as an office boy....