Chicago

====Transit systems====
[[File:Chicago (ILL) Union Station, great Hall, 1925.jpg|thumb|upright|[[Chicago Union Station]], opened in 1925, is the third-busiest passenger rail terminal in the United States.]]
The [[Regional Transportation Authority (Illinois)|Regional Transportation Authority]] (RTA) coordinates the operation of the three service boards: CTA, Metra, and Pace.
* The [[Chicago Transit Authority]] (CTA) handles public transportation in the City of Chicago and a few adjacent suburbs outside of the Chicago city limits. The CTA operates an extensive network of buses and a [[rapid transit]] elevated and subway system known as [[Chicago "L"|the Chicago "L" or just the "L"]] (short for "elevated"), with lines designated by colors. These rapid transit lines also serve both [[Chicago Midway International Airport|Midway]] and O'Hare Airports. The CTA's rail lines consist of the [[Red Line (Chicago Transit Authority)|Red]], [[Blue Line (Chicago Transit Authority)|Blue]], [[Green Line (Chicago Transit Authority)|Green]], [[Orange Line (Chicago Transit Authority)|Orange]], [[Brown Line (Chicago Transit Authority)|Brown]], [[Purple Line (Chicago Transit Authority)|Purple]], [[Pink Line (Chicago Transit Authority)|Pink]], and [[Yellow Line (Chicago Transit Authority)|Yellow]] lines. Both the Red and Blue lines offer 24‑hour service which makes Chicago one of a handful of cities around the world (and one of two in the United States, the other being New York City) to offer rail service 24 hours a day, every day of the year, within the city's limits.
* [[Metra]], the nation's second-most used passenger regional rail network, operates an 11-line [[commuter rail]] service in Chicago and throughout the Chicago suburbs. The [[Metra Electric Line]] shares its trackage with Northern Indiana Commuter Transportation District's [[South Shore Line (NICTD)|South Shore Line]], which provides commuter service between [[South Bend, Indiana|South Bend]] and Chicago.
* [[Pace (transit)|Pace]] provides bus and [[paratransit]] service in over 200 surrounding suburbs with some extensions into the city as well. A 2005 study found that one quarter of commuters used public transit.<ref>[https://money.cnn.com/2007/06/13/real_estate/public_transit_commutes/index.htm "New Yorkers are top transit users"] {{Webarchive|url=https://web.archive.org/web/20080516222801/http://money.cnn.com/2007/06/13/real_estate/public_transit_commutes/index.htm |date=May 16, 2008 }}, by Les Christie,''CNNmoney.com'', June 29, 2007. Retrieved September 21, 2009.</ref>

[[Greyhound Lines]] provides inter-city bus service to and from the city at the [[Chicago Bus Station]], and Chicago is also the hub for the Midwest network of [[Megabus (North America)]].