Not to split hairs, but I'm more confused than anything:
The last time, I was in Florida, I needed to buy some special toll card to use the "highways". When I asked why, I was told that the U.S. Highways were free to use but their coverage was limited, so everyone use the toll-based " private" highways.
So, being the pessimist that I am, I assume they're removing flock from the (few) u.s. highways but not from the private (often used) toll roads, no?