Late-night CTA riders can expect some minor delays this week on the Red and Blue lines.
The Red Line will run on one track from 10 p.m. to 4 a.m. this week, according to the CTA.
The delays are a result of the subway's sewer cleaning work. All Red Line trains will run on northbound tracks between the North/Clybourn and Lake stations, according to the CTA.
That means riders headed south must board and exit trains from the northbound side of the platform at the Clark/Division, Chicago and Grand stations.
The situation is similar for the Blue Line. Due to lighting installation, night trains will run on the southbound (Forest Park) tracks between the Clark/Lake and Damen stations from 10:30 p.m. on Wednesday until 4:30 a.m. the next morning.
Customers heading northbound toward O'Hare will have to board and exit trains from the southbound side of the platform at Grand, Chicago and Division stations.