To NakedAgent: Yes, the map is inspired by a real place, I found and added photos of this place to the gallery. I've added some models of mailboxes to the map (supplied in game and created by Valve developers) but they seem quite small, probably won't provide much cover but rather make the surroundings more visually interesting.

Looks good. Is this a real place? You got a lot of telephones in that map. It would be better to have an occasional mailbox.