branch, 9 in the Milwaukee–Dearborn subway and 13 on the O'Hare branch). At about 27 miles, it is the longest line on the Chicago "L" system and second busiest
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
Dearborn Station (also called, Polk Street Depot) was, beginning in the late 1800s, one of six intercity train stations serving downtown Chicago, Illinois
after being ordered by the Chicago Rapid Transit Company in 1937. In 1969, the stairs to the northwest corner of Dearborn Street and Monroe Street were