Basically if a State misspends any Federal money they just have to give it back. So whatever the State spent of TE is what they would be obligated to give back.
I will note that the Recreational Trail Program is exempt from the transportation requirement, and in other States they do use this program to build trails.
AA County (B&A trail) has a policy that the park closes but the trail stays open.
Washcycle's coverage:
http://www.thewashcycle.com/2010/12/...fter-dark.html