No. It's illegal to even walk too close to train tracks everywhere in the US, as far as I'm aware. Something like this would never, ever be allowed to get off the ground here.
That's a surprisingly widespread law, worldwide. One that's rarely enforced.
In other words, I don't think anyone asked for a permission here - it would not be allowed either, but IMHO the authorities don't care as long as there's no major problem.
