Design Resource: Transport for London’s “Line Diagram Standards” Guide
Definitely worth a look to see how a major transit agency puts together a comprehensive guide to assembling consistently designed maps. The guide deals with horizontal in-car strip maps and the vertical line maps seen on platforms, but many of the principles still hold true for the design of a full transit map. Of particular interest is the relationship between the x-height of Johnston Sans and the thickness of the route lines (they’re the same). […]