"L" (Rail system : Chicago, Ill.)

found: Chicago Transit Authority. Rail ('L') system map, 2021, via WWW, September 12, 2022. - https://www.transitchicago.com/assets/1/6/ctamap_Lsystem.png

found: Chicago Transit Authority website, September 12, 2022:more > agency overview (CTA service is provided by two modes: bus and rail; The 'L': Our rail system, known as "The 'L'", consists of train lines spanning the city and neighboring communities. The service provided is described as "heavy rail rapid transit," also referred to as a "subway" or "metro" in many parts of the world; The 'L' system has eight rapid transit routes and consists of 145 stations over approximately 224.1 miles of track. Parts of the 'L' run above ground, in subway tunnels and tubes, as well as at grade or in expressway medians; The nickname 'L' is short for "elevated," a reference to the all-elevated beginnings of the system (even though, as just mentioned, parts of the system today are at or below ground))

found: Wikipedia, September 12, 2022:Chicago "L" (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. Operated by the Chicago Transit Authority (CTA), it is the fourth-largest rapid transit system in the United States in terms of total route length, at 102.8 miles (165.4 km) long as of 2014, and the third-busiest rail mass transit system in the United States, after the New York City Subway and the Washington Metro; The "L" provides 24-hour service on the Red and Blue Lines and is one of only five rapid transit systems in the United States to do so; The "L" gained its name because large parts of the system run on elevated track)

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