Officials said around 2:10 a.m., a three-car crash on I-57 outbound near Halsted Street occurred. This caused the interstate to close from Halsted Street to 111th Street – creating traffic that backed onto the Dan Ryan Expressway.
An off-duty Chicago police officer drove up to the scene and saw a woman attempting to walk away, police said. The officer ordered the woman to come back.
When she was walking back, police said the woman was struck by a vehicle in the left lane, leaving her in critical condition.
A man was also taken to a hospital with non-life-threatening conditions, police said.
Traffic was diverted off at Halsted Street during an investigation. All lanes reopened before 6:08 a.m.
There is no further information available at this time.