Police say they arrived on scene around 1:30 p.m. to find a silver 2001 Nissan Sentra upside down on the side of the road at Sixth Line between Steeles Avenue and 5 Side Road. They believe only one car was involved in the crash.
Officials later added that the Sentra went off the road around 1:10 p.m. and rolled onto the east side of 6th Line. The woman was pronounced dead at the scene, according to a police news release.
The police investigation closed the Sixth Line between Halton Hills and Milton for several hours. It has since re-opened.
Police are asking any witnesses to this crash to contact Halton Police Collision Reconstruction Unit at: 905-825-4747 ext. 5066.