A great Infection map indeed. The map has a nice flow that keeps things interesting from multiple playthroughs. It does a great job of making sure there isn't that one over powered spot that everyone gos to. The map is very zombie friendly without making them too power full.
Theme overall theme of a metro station is absolutely sold here. I love the way you have made the trains. I rate this my 5 stars because I was thinking of building a train map as well. Seeing someone else have that idea and make it come true before me makes that little Zore on the inside smile. :)
Overall great map. Hoping this make the playlist in the future.
(P.s That is the most public bathroom I've ever seen!)