These are great for wildlife as they provide a safe crossing over high-speed highways. They are usually design to be in already existing migration paths where moving a proposed highway may not work and not disrupting migration paths is of importance.
Seem to be planted and growing on the sides. Not sure why they wouldn't plant the whole thing, especially with forests on both sides. This kind of defeats the purpose of the overpass.
adding "trees" might also help. just build something that gives shelter. though I think the people that build those things probably thought about it more than I did.
Hmm, I would have thought those on the sides to also be bushes. They're at least tiny compared to the trees on the right side of the picture. But yeah, hard to tell with how pixelated it is...
That would only work for apex predators, or they'd also get camped. Humans would probably camp any other apex predator that started camping there. The game balance is fairly good except for the Human class.