Looking behind the fence you can see that they have made progress on expanding the pathway for Pumpkin Nights which will continue to go through this area.
When you ride the train you can get a good view of the pathway from the other end
They are definitely expanding the width of the pathway
You can see just how much wider the pathway will become here. They are having to decrease its width with a funky curve so that it will match the width of the railroad crossing still
The park claims that the construction walls are just for the expansion of the walkway, but they didn't put up fences when they originally put in the pathway so it why would they do it for an expansion?