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 ...

People check out the newly opened Second Avenue Subway 86th Street station in New York on Jan. 1 in New York City. (AP Photo/Craig Ruttle) This is your first of three free stories this month. Become a ...

LOS ANGELES (KABC) -- For years, Metro rail lines have sounded the same, but with Metro set to expand its reach over the next decade, it is going to run into a colorful quagmire: too many lines, not ...

CHICAGO (WLS) -- ABC7 is on the streets, answering your traffic and transit questions. A few people asked Roz Varon about the names of the CTA's transit lines. When did the names convert to colors and ...

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 ...