Maureen Lungstrom was driving south on Ipsen Road around 2 a.m. when she lost control of her car. She crashed through a fence and flipped down an embankment before ending up on the shoulder of I-90.
Lungstrom was pronounced dead at the scene. Her passenger, Ryan Bommer of Rockford, was airlifted to Saint Anthony Medical Center where he's in serious condition.
The accident is still under investigation.