The Chicago "L" 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 rapid transit system in the United States. In 2016, the "L" had 1,492 rail cars, eight different routes, and 145 train stations. In 2023, the system had 117,447,000 rides, or about 373,800 per weekday in the fourth quarter of 2023.
The Blue Line is a 26.93-mile-long (43.34 km) Chicago "L" line which extends through The Loop from O'Hare International Airport at the far northwest end of the city, through downtown via the Milwaukee–Dearborn subway and across the West Side to its southwest end at Forest Park, with a total of 33 stations. At about 27 miles, it is the longest line on the Chicago "L" system and second busiest, and one of the longest local subway/elevated lines in the world. It has an average of 64,978 passengers boarding each weekday in 2022.
Wells Street Terminal was a stub-end downtown terminal on the 'L' in Chicago, Illinois, located at Wells Street between Jackson Boulevard and Van Buren Street. The terminal was in operation from 1904 to 1953.
95th/Dan Ryan, announced as 95th, is an 'L' station in the median of the Dan Ryan Expressway and serving Chicago's Roseland neighborhood. It serves as the southern terminus of the Chicago Transit Authority's Red Line. This station was the system's thirteenth busiest in 2021. Trains take approximately 30 minutes to travel to the Loop, and 60 minutes to reach Howard.
The Pink Line is an 11.2 mi (18.0 km) rapid transit line in Chicago, run by the Chicago Transit Authority (CTA) as part of the Chicago "L" system. It is the CTA's newest rail line and began operation for a 180-day trial period on June 25, 2006, running between 54th/Cermak station in Cicero, Illinois and the Loop in downtown Chicago. As the line enters downtown Chicago, it begins to share tracks with Green Line trains on Lake Street. This connection is handled by the previously non-revenue Paulina Connector set of tracks. In 2022, over 3 million passengers boarded Pink Line trains.
Quincy is a rapid transit station on the Chicago "L" system. It is located between the Washington/Wells and LaSalle/Van Buren stations on the Loop. The station is located above the intersection of Quincy Street and Wells Street in downtown Chicago, Illinois. Having opened in 1897, it is one of the oldest surviving stations on the 'L' system.
Clark/Lake is an 'L' station located at 100/124 West Lake Street in Chicago's Loop district, and is accessed from the James R. Thompson Center and 203 North LaSalle building. It is one of the most complex stations on the 'L' system, comprising an elevated station and a subway station. The elevated station is serviced by the Brown, Green, Orange, Pink, and Purple Lines, while the subway platform is serviced by the Blue Line. In December 2014, it had an average of 17,644 weekday passenger entrances, making it the second busiest station in the 'L' system. The Richard J. Daley Center, Chicago City Hall, and Chicago Title and Trust Center are also served by the station. It is the busiest station on the Loop Elevated, and the second-busiest station on the 'L' system as of December 2014. This station had been recognized as the station(s) with the most pickpockets by ABC 7 Chicago in 2018.
Ashland is an 'L' station on the CTA's Green and Pink Lines. It is an elevated station with two side platforms, located in Chicago's Near West Side neighborhood at 1601 West Lake Street. Just to the west of the station, the Pink Line branches off from the Lake Street branch to follow the Paulina Connector to the Douglas branch. The adjacent stations are California (Green), which is located about 1+1⁄2 miles (2.4 km) to the west, Polk (Pink), which is located about 1 mile (1.6 km) to the south, and Morgan station, approximately 3⁄4 mile (1.2 km) to the east.
Midway is an 'L' station on the CTA's Orange Line. It is the southwestern terminus of the Orange Line and serves Midway International Airport in Chicago, the city's second-largest airport. The turnstiles at the station's entrance are somewhat wider than most to accommodate airport passengers and their luggage. The station, along with the rest of the Orange Line, opened on October 31, 1993 after a long wait by Chicago's southwest side for 'L' access. It is also the closest station to SeatGeek Stadium, former home of the Chicago Fire, which is approximately 4 miles away. Although in the Garfield Ridge community area, the station serves many residents in the West Elsdon and West Lawn neighborhoods.
Washington is an 'L' station on the CTA's Blue Line. It is situated between the Clark/Lake and Jackson stations in the Milwaukee-Dearborn subway and is near the Richard J. Daley Center.
Jackson is an 'L' station on the CTA's Blue Line, located in the Loop.
LaSalle is an 'L' station on the CTA's Blue Line. It is a subway station with a single island platform located at 150 West Ida B. Wells Drive in the Loop district of Chicago, Illinois.
Western is a station on the 'L' system, serving the Blue Line's Forest Park branch. It is located in the median of the Eisenhower Expressway. It serves the Near West Side neighborhood and Crane Tech High School. The station is also located about 1 mile (1.6 km) north of the Western Avenue commuter railroad station.
Forest Park is a station on the Chicago Transit Authority's 'L' system, located in the village of Forest Park, Illinois and serving the Blue Line. Before the Congress Line was built, it served as terminal for the Garfield Line. It is the western terminus of the Forest Park branch. The station was known as Des Plaines until 1994. It is also referred to as the Forest Park Transit Center by Pace because it is a major terminal for Pace buses. The station contains a 1,051-space Park and Ride lot which uses the "Pay and Display" system, in which fees are paid at the lot entrance. It is located south of the Baltimore and Ohio Chicago Terminal Railroad tracks which curve to the north of the station towards Madison Street where the line rechristens itself to the Canadian National Railway's Waukesha Subdivision.
The Metropolitan main line was a rapid transit line of the Chicago "L" system from 1895 to 1958. It ran west from downtown to a junction at Marshfield station. At this point the Garfield Park branch continued westward, while the Douglas Park branch turned south, and the Logan Square branch turned north with the Humboldt Park branch branching from it. In addition to serving the Chicago "L", its tracks and those of the Garfield Park branch also carried the Chicago Aurora and Elgin Railroad, an interurban that served Chicago's western suburbs, between 1905 and 1953.
The Milwaukee–Dearborn subway is an underground section of the Chicago "L" system in The Loop, Chicago, Illinois. It is 3.85 mi (6.20 km) long and forms the central part of the Blue Line. As of February 2013, the subway serves an average of 44,584 passengers each weekday. Since the subway is served by the Blue Line, it is open to passengers 24 hours a day and 365 days a year.
The Logan Square branch was an elevated rapid transit line of the Chicago "L", where it was one of the branches of the Metropolitan West Side Elevated Railroad. Diverging north from the Metropolitan's main line west of Marshfield station, it opened in 1895 and served Chicago's Logan Square and West Town neighborhoods. North of Damen station, the Humboldt Park branch diverged from the Logan Square branch, going west to serve Humboldt Park. The original Logan Square branch was separated into several sections in 1951, some of which remain in revenue service as of 2023.
The Chicago "L" used skip-stop service, wherein certain trains would stop only at certain designated stations on a route, from 1948 to 1995. It was implemented as a way to speed up travel within a route, and was one of the Chicago Transit Authority's first reforms upon its assumption of the "L"'s operations.
The Lake Street Transfer station was a rapid transit station on the Chicago "L", serving as a transfer station between its Lake Street Elevated Railroad and the Logan Square branch of its Metropolitan West Side Elevated Railroad. Located where the Logan Square branch crossed over the Lake Street Elevated, it was in service from 1913 to 1951, when it was rendered obsolete by the opening of the Dearborn Street subway.
Canal was a rapid transit station located on the Metropolitan main line of the Chicago "L" that was in service from 1895 to 1958, when the entire main line was replaced by the Congress Line located in the median of the nearby Eisenhower Expressway. Starting in 1927, the interurban Chicago Aurora and Elgin Railroad (CA&E) also served the station, continuing until 1953. The station connected with Chicago's Union Station, which was one of the city's rail terminals. One of the busiest stations on the Metropolitan's routes, and of the "L" in general, it opened a second entrance on Clinton Street in 1914.
Union Station 
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