Northbound trains are not running in the subway from Cermak-Chinatown all the way north to Fullerton.
Instead trains are running on the elevated tracks.
You can catch trains at stations along Wabash and Lake.
The re-route continues until 4 a.m. on Monday.
For more information:
http://www.transitchicago.com/travel_information/alert_detail.aspx?AlertId=17390#map