How to read it
Each station is a set of concentric circles representing every line in a system with only those colored that it serves. Circles are sequenced a rainbow-like order using the systems' official colors with reds and oranges as the outer-most circles and purples, pinks, browns, and greys as the inner-most. Organizing stations alphabetically produces random patterns and gives each city its own identity.
Boston
Chicago
London
New York City
Paris
Washington DC
Published July 30, 2014
