en.wikipedia.org/wiki/Chicago_%22L%22

The Chicago "L" (short for "elevated") is the rapid transit system serving the city of Chicago and some of its surrounding suburbs in the U.S. state of Illinois.

www.transitchicago.com/maps

cta, chicago transit authority, maps, metro map, subway map, bus map, rta, transit , sightseeing, chicago. ... The CTA 'L' System map shows train routes only.

www.transitchicago.com/howto/riding-the-train

CTA's train system is known as the 'L' (a now-official name originally short for " elevated"). Trains serve over 140 stations located throughout the city and nearby  ...

www.architecture.org/learn/resources/buildings-of-chicago/building/the-chicago-l

The Chicago L is now 125 years old. This network of elevated trains and subways is how Chicagoans get around. But it's also an iconic symbol of the city.

www.chicago-l.org

Comprehensive resource for information on the Chicago rapid transit system -- the 'L' -- including history, stations, rolling stock, maps, current news, FAQ, ...

www.chicagotribune.com/news/ct-xpm-2012-02-14-ct-talk-cta-el-or-l-0214-20120214-story.html

Feb 14, 2012 ... You may have wondered, as you climb aboard a CTA train: Are you about to ride the "El" or the "L"? Grid Chicago, a blog devoted to ...

www.choosechicago.com/plan-your-trip/trip-ideas-and-itineraries/classic-and-unique-chicago/sightseeing-along-the-l-train

Chicago has an excellent public transportation system, including the 'L' or elevated train tracks that run throughout the city. Go sightseeing in Chicago for just the ...

loopchicago.com/in-the-loop/then-and-now-a-brief-history-of-the-chicago-l

And so the first 'L' train (then Chicago and South Side Rapid Transit Railroad) was built in 1892, and its inaugural journey took place on June 6, spanning 3.6 ...