The Forest I worked with had to meet certain stability and erosion standards to keep the roads open (I believe, but don’t know, those were Regional Standards). If they didn’t have the resources to maintain those standards, they had to be closed.
Again, I did not work for the Feds so this next thought might be coming out of my tail pipe….Regarding allowing citizens to clear the roads there may be two issues: (These are questions we had to deal with in the State system.) First is liability. Someone dings themselves with a chainsaw clearing the roads on lands for which the agency is responsible, who is liable? Doesn’t seem like this should be a big deal, but in the world of law suits, it is. Second. Are the folks who would normally do that work unionized? If so, there could be contractual agreements that to be addressed. I do believe that most National Forests have “Friend of the Forest” organizations that might have the potential to address those concerns, but I don’t know that for certain.
Anyways, I’m not advocating, but rather sharing some of the generally unseen complications to managing public lands.