The old maps of the city's 'L' system show a complex web of lines and routes. Wednesday we mark 25 years of using color-coded route names on the 'L'! This pic of an early 1993 map (at Illinois ...

According to the Chicago Transit Authority, today marks 25 years since our the city color-coded the train ... this map from 1915: Obvious differences include the lack of Orange and Pink Lines ...

CHICAGO (WLS) -- The Chicago L celebrates 25 years of color-coded rail lines Wednesday ... As vintage CTA maps will show, train lines "were either directional like north-south route," or ...