The London Underground tube map is regarded as a modern day design triumph, but the ever expanding rail network is testing it to its limits. Could the increase in technology and the availability of digital services at each station open up a new world of user interaction with the map? And could this improve the whole wayfinding experience?
http://londonist.com/2013/02/will-there-always-be-a-tube-map.php
Design Wayfinding 