A few years after the speed limit was raised to 65 PA was still 55 with big signs at the state line usually with a state police car parked right under that sign. 79N from Morgantown WV into PA you went around a curve carved into the side of a mountain and then saw brake lights as people saw the state line, 55 limit sign and car sitting there. The PA state police would give tickets for doing 5+. I was driving through there late one night doing 55 and a car was tailgating me for miles refusing to pass and flashed the high beams at me a couple times. Finally it turned onto an offramp and I could then see it well enough to tell it was a police car.
There was a state high 48 through WV and MD which was turned into interstate highway 68 and was going to be extended all the way over to I77 so people could bypass PA and finally they gave in an raised the speed limit to 65 so I68 never went past Morgantown.