Each metro line usually has its own color on the map. For obvious reasons, these colors should be maximally different. Suppose a new metro line is built. We now explain a strategy to choose the color ...
CHICAGO (CBS)-- Wednesday is red-letter day at the CTA - 25 years since the CTA first began using color-coded route names on the 'L.' It's as simple as black and white: the 'L' is part of the fabric ...
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