Information and Wayfinding: London Underground

Obviously this infograhpic designed to mark out the route of the London Underground has made a massive influence on peoples lives in both the design world and the consumer market. It's clearly served it's potential throughout the years. In terms of print, this would have had to be mass produced for either a travel guide or it could have been printed to be placed on the walls. A number of methods could have been used such as  CMYK flexography or even rotary screen printing, depending on the cost. 

http://www.makemassair.co.uk/stuff/design-london-underground-maps-geographical-and-anagrams/