The woman, Georgia Psyrris of Markham, Ont., was allegedly driving southbound at a high rate of speed and making erratic lane changes on the Don Valley Parkway near Don Mills Road, according to Toronto police.
At around 7:43 p.m., she is alleged to have made a lane change from the passing lane to the centre lane, and crashed into a van.
The driver of the van lost control of his vehicle, leaving the roadway and rolling over.
The passenger of the van, a 49-year-old man, suffered life threatening injuries and was taken to hospital.
The woman was arrested on the scene.
She is charged with:- Dangerous operation of a motor vehicle causing bodily harm
- Criminal negligence causing bodily harm
- Driving while under suspension
She was scheduled to appear in court Thursday.
Police are asking anyone with information to contact them at 416-808-1900 or Crime Stoppers at 416-222-8477.