A school bus was involved in a crash Friday afternoon on the highway near Dalmeny.
It happened around 3:30 p.m. about 1.5 km south of the small town.
Police say a school bus carrying 10 students was struck from behind by a mini-van and a pickup truck.
No one on the bus was injured.
The STARS helicopter ambualnce had to take the 46-year-old female driver of the van to hospital with serious injuries
The 40-year-old female driver of the truck was also taken to hospital but with non life threatening injuries. The two children with her were uninjured.
No word yet if any charges will be laid.