It's not uncommon to see people go 20 over on country roads (including mountain roads) in Virginia. That means 55 in a 35, or 60 in a 40. Those roads don't have great visibility, and I've had more than a couple of unnecessarily close calls because of recklessly speeding drivers.

Edit: The upstream thread even has an article where the author describes doing 93 on a 55 backroad in VA and subsequently getting arrested[1].

[1]: https://jalopnik.com/never-speed-in-virginia-lessons-from-my...