A 25-year-old woman was seriously injured in a crash involving five vehicles early Saturday evening on the Jane Addams Tollway near I-294, Illinois State Police said.
Troopers were called about 4:45 p.m. to the pileup that blocked all eastbound lanes for roughly three hours, Master Sgt. Nick Hasan said.
Just after 8 p.m., state police reopened entrance ramps onto eastbound I-90 at Elmhurst Road and Route 53.
The woman, who was driving a motorcycle, was taken to Advocate Lutheran General Hospital in Park Ridge. She was in critical but stable condition late Saturday night, Hasan said.
State police continue to investigate what triggered the crash.