An SUV rolled over Sunday afternoon on southbound Interstate 94 near Deerfield, ejecting a woman who was not wearing a seatbelt, officials said.
Five people were in the vehicle when it was traveling on the Tri-State Tollway near Route 22 in Lake County.
In addition to the woman who was ejected, four other passengers sustained injuries, including a child who was not belted in.
No other vehicles were involved.
The cause of the crash is being investigated.