http://www.theguardian.com/books/2014/aug/07/game-of-thrones-rail-network-map-westeros-michael-tyznik-george-rr-martin?CMP=fb_gu#
very well done! I suspect Aeo had something to do with this.
They just must hope that the rails are not run by Scotrail. The train service would be less reliable than the political situation and people might as well just walk everywhere, or with their short life expectancies they might not make it to their destination alive by the time the train arrives.