Quote Originally Posted by Adogg View Post
They would use the funneled entrance to bring in new people like new prisoners. Think of it live walking in a canyon single file with armed guards above you on both canyon walls. If they don't see your value then they seperate you and kill you.
The signs were pointing to the evac site which the colony was eventually built around. Why they didn't take the signs down, who knows. Maybe there are just bigger fish to fry in the whole zombie apocalypse thing.