Posted, as in warning, or posted, as in invite to the policemen's ball?
Yes.
Some help!
I don't mind opening it up, but I don't want any velocity check slips. I got busted for a speed that exceeded good, bad, and terrible judgment, years ago. A judge gave me a suspended sentence, due to circumstances. One of the circumstances was that the guy I was racing turned out to be HP. His Corvette topped out at 182, and he was a bad loser. The original judge ruled not an isolated incident. Apparently, at 40 over, you lose your license and go to jail.
The roads my GPS took me on were gravel, through the middle of cornfields. No posted speed limits (IL), but probably supposed to be 25 or so. The gravel roads had names, and occasional stop signs. It was night, with no lights.
Our bad roads (old logger trails) are still 60MPH, but sometimes turns have warnings (yelow signs with speeds down to 5MPH). If they say 5MPH, it's best to stop, because you'll need to 3-point the turn. One section had so many deaths every year that they made bypasses, then fixed those 5 miles or so. I think it was called bloody alley. There used to be a big sign. The problem is that you can't see if someone ahead of you is slow in or after a turn. The deaths were not from rear-ending, though.