Lime Line L Train Proposed for West Side : r/chicago

What if Chicago actually did have rapid transit everywhere? - Streetsblog Chicago

CTA Leaders Vow To Fix Unreliable Service With More Hiring, Improved Train And Bus Tracking

Early years of Chicago's 'L' -- Chicago Tribune

Completion Date Announced For Damen Green Line Station In Near West Side - Chicago YIMBY

CTA Rail System Map Poster Features All Lines: Red, Orange, Blue, Purple, Brown, Yellow, Green and Pink Designed in Chicago

An Ode to Chicago's Secret 9th 'L' line: The Brownge Line, by Quinn Kasal

Violent crime is spiking along the CTA train system: A look at the numbers - CBS Chicago

Chicago L - Wikipedia

Green Line (Route info, alerts & schedules) - CTA

Metropolitan West Side Elevated Railroad - Wikipedia