Not just federal; NPS property. I didn't know they were that rigid about the speed limit, especially considering most of it is 50 mph speed limit. Or did you get busted in a slower section?
It's not just a federal thing. In Florida state parks law enforcement have a reputation of bustling you for speeding even a little but the park roads are rarely posted above 30 mph.
I loved driving the parkway in 2016. I don't recall much police activity.
Not sure why people travel NTP or BRP without making time to stop and see the sights.
That explains Florida then. Half the people are from New England and continue their "drive like they feel like it" attitude. The other half are country folk who think they're the Duke Boys, but in pickup trucks.
Personally, I think speed limit enforcement across the country needs to be substantially stepped up. Also, a way to effectively enforce it because a cop car sitting in the median only enforces the speed limit as far as he can see. Not so worried about 2 mph over, but people caught doing 15+ over should lose their license for life.
Speed limits are a personal pet peeve of mine because they are a clearly posted maximum (not a suggestion) that the majority of drivers deliberately and flagrantly ignore. They're a symptom of a much larger problem with American society: the entitled mindset of "rules don't apply to me when they're inconvenient." I wish I could see that mentality go extinct in my lifetime, but I'm sure I will have no such luck.