A 25-year-old woman was seriously injured in a crash on Anthony Henday Drive on Wednesday afternoon.
The woman was driving east, just past 111 Street, when her Honda Civic struck the side of a loaded tractor-trailer, crossed two lanes of traffic and hit a light standard head-on, police said.
She was taken to hospital with serious but non-life-threatening injuries.
No other injuries were reported.
The crash is under investigation, but police believe a medical episode was a factor.