Going north as you say is not such a deal but it is the south run where they really work it.
There was a small town in East Tennessee on Highway 411 that had posted speed limit signs that read 34 MPH...If you were doing 35, you got nailed...No tolerance allowed...They would even take you to the judge’s house and fine you right at his front door....*LOL*
Funny, I know I had to come south through there, but I can't recall the speed warnings etc., yet I remember the arrangement going north quite well. Still, it's been 15 years.
We used to go 301 from Ocala through there up to 10 then 95 to Savannah. Better than 75 to 10 and over.