During the first weekday commutes since the project started over the weekend, traffic was snarled for miles before 95th Street, and travel times soared Monday.
Traffic delays can be expected during the lane closures, which run through 10 p.m. Oct. 29, according to a CTA news release.
The lane closures are part of $280 million upgrade to the South Side rail station and bus terminal. Construction began in late 2014, and the station has remained open during the project.
The south terminal is scheduled to be completed early next year, and the north terminal will be ready late next year, CTA officials said.
The 95th Street terminal was built in 1969.