Inclinator as Gatekeeper is a book in Deus Ex: Invisible War. It discusses the Inclinators role in separating Lower Seattle and Upper Seattle. A copy of this book can be found in Heron's Loft Apartments, Lower Seattle.
There are those that revere the Inclinator as a symbol of connectedness between Upper and Lower Seattle, but those living in the shadow of the platformed city know it is a myth. The Inclinator divides more than it connects. It ensures that only a select few can pass over the gap between the haves and the have-nots. It guards against the "wrong kind" of person travelling into the bright, clean streets of Upper Seattle.