The Dan Ryan branch is a 9.4 mi (15.1 km) long section of the Chicago "L" system located on the South Side of Chicago, Illinois. It is operated by the Chicago Transit Authority, as part of its Red Line service and is normally through-routed downtown towards the North Side via the State Street subway. As of February 2013, the branch serves (on average) 45,355 passengers per weekday. As part of the CTA's busiest rapid transit line, it is operated 24 hours a day, 365 days a year. The branch serves the Chinatown, Armour Square, Fuller Park, Englewood, Greater Grand Crossing, Chatham and Roseland neighborhoods.