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This is a list of bus routes operated by the Chicago Transit Authority.
The 4 (between 63rd/Cottage Grove and Washington/State only), 9 (between 95th/Dan Ryan and North/Clark only), 20 (between Michigan and Austin only), 22 (between Howard and Harrison only), 34 (between 95th/Dan Ryan and 131st/Ellis only), 49 (between 79th and Berwyn only), 53 (between Harrison and Irving Park only), 55 (between Museum of Science and Industry and 55th/St. Louis only), 60 (between Washington/State and 54th/Cermak only), 62 (between Washington/State and Midway), 63 (between Midway and 63rd/Stony Island only), 66 (between Chicago/Pulaski and Washington/State only), 77 (between Octavia and Halsted only), 79 (between Western and Lakefront only), 81 (between Jefferson Park Blue Line station and Wilson/Marine only), and 87 (between Western and the 87th Red Line station only), routes all run 24/7.