Chicago has the nation's second largest transit system, eclipsed only by New York City's mammoth transit system. Rounding out the top five are Boston, Washington, D.C., and San Francisco.
Student at the University of North Carolina School of Government's online Master of Public Administration program, MPA@UNC, has created an infographic to illustrate the history and scope of the five largest public transportation systems.
The "Let's Take a Ride" infographic compares ridership, revenue, upcoming improvements, and even frequent customer complaints of transit systems in those cities.
I've always found these comparison numbers to be interesting, and perhaps you will too.
Here are screenshots of the CTA infographic.