Closing the park doesn't necessarily mean closing the road through it. I'd bet that it means taking away funding so that it's no longer designated as a park and maintained as such. Which means that it's either left to sit and rot, full of trespassers and who knows what else, or it's opened up to developers.

I've been hiking those parks and visiting the historic monuments in them for 20years and I don't care if this is a hoax or some MTB-centric hoo-hah. If there's the slightest chance of the places I love and that my taxes pay to preserve being shut down, I'm gonna open my big mouth and let the powers-that-be know I'm not in favor of it.