STARS was called to the scene of a serious collision, south of Aldersyde just after 4 p.m. Wednesday afternoon.
There was a two vehicle incident between a Ford F-150 and an older model white car.
According to a spokesperson for STARS, The sole occupant of the car, an 84-year-old woman, was airlifted to Foothills Hospital in Calgary in serious but stable condition.
The Highway was closed for approximatley 40 minutes in both directions.