There's a whole introductory text about this problem space, "The Vertical Transportation Handbook"[1]. If you can get your hands on a copy of it, you'll probab

There's a whole introductory text about this problem space, "The Vertical Transportation Handbook"[1]. If you can get your hands on a copy of it, you'll probably be there for a while. :) [1] http://www.worldcat.org/title/vertical-transportation-handbook/oclc/676970674 http://www.worldcat.org/title/vertical-transportation-handbo...