A woman who allegedly failed to stop at a stop sign in Grey County on Monday has died of her injuries.

Grey County OPP say Michelle Greenhill was behind the wheel of a passenger vehicle on Southgate Sideroad 39 when she drove past the stop sign and into the intersection at Grey Road 9, north of Mount Forest.

Her vehicle then collided with a tractor-trailer.

The 47-year-old woman – a resident of Cape Girardeau, Missouri, who was staying with a relative in the area – was airlifted to a London hospital in critical condition, and pronounced dead Thursday while still in hospital.