RCMP investigation has revealed new details on a crash that left one woman in critical condition Monday night.

RCMP say a semi ran a red light at Dugald Road and the Perimeter Highway, colliding with a minivan around 8:30 p.m. Monday.

The woman driving the minivan was sent to hospital with serious injuries. The driver and passenger of the semi were not injured.

A stretch of the east Perimeter Highway was closed for the majority of the night Monday.

RCMP have not yet laid charges as the investigation is continuing.