Several pages ago I made a comment about the Clarion-Toby Creek path in Ridgway, PA and that for 3 miles or so, it is right next to the B&P RR. "Shared space." I didn't have a picture back then but I do now. It annoys me if it can be done in PA, why not here.
Section with a fence: https://i.postimg.cc/C1P8HQkz/IMG-2350-1.jpg
Section without a fence: https://i.postimg.cc/pd8hndXc/IMG-2351-1.jpg
There is a sign further up about installing more fence. Personally, the fence really won't help. In the first pic, you can see how easy it would be for somebody to climb over it. But, it would prevent unauthorized motor vehicles from jumping the track [snowmobiles and ATV's]. Yet again, they could just cut through the tree line anywhere and have at it.
Here in Buffalo, I was x/c skiing the Industrial track [Gardenville line near airport] and a snowmobiler came down the line and went up and over the track and watched the huge effort it took to get over the rails. He really dug into the ballast. I was hoping he'd get hung up on the rails. No such luck.