I'd like to know more about what dobbo has said.
I know a large amount of money has been allocated for roadworks in the area including Wambo Forest Road. Is this what the closures are for?
The problem for us is that vehicular tracks in National Parks have to be "public access" standard. I interpret that as must be suitable for the family corrola. If they can't justify the cost to bring tracks up to this standard, they close them.
However walking tracks can be all grades from wheel chair accessible to difficult.

