Due to some kind of long-standing environmental lawsuit the Forest Service in California's D3-5 zones put out some kind of motor vehicle route usage maps. Some of the trails I have taken into the Squaw Ridge area that borders the Mokelumne Wilderness are now displayed on the maps as being inaccessible to vehicles, though you can still hike to the wilderness from the point of blocked access. Have any of you experienced these closures? Are there physical barriers -- boulders, berms, locked gates, etc. -- to prevent motor vehicle use beyond these points? I don't mind hiking in but don't want to put in the effort if some one else is going to just motor on past me because the restricted route is not physically shut. Tried calling the Forest Service but no one answered.