Red line trains in both directions will operate on the same track between 95th and 79th streets from 10:30 p.m. Tuesday until 4:30 a.m. Wednesday. The same work will again take place during the same time on Wednesday and Thursday nights.
On the Blue Line, trains in both directions will operate on the same track between Jefferson Park and Harlem stations. That work begins at 10 p.m. Tuesday and ends at 4 a.m. on Wednesday. The work will also take place at the same time Wednesday night into Thursday morning.