SHERMAN -- A major accident Wednesday night sent four people to local hospitals. It happened around 7:30 p.m. at Highway 75 and Loy Lake Rd.
Four people were ejected from a brown sedan.
Police say the car was traveling down the service road, then drove onto the left shoulder, overcorrected and flipped.
The driver and three passengers were thrown from the vehicle.
One 17-year-old woman, Ciara Donahoe, the back seat passenger, was flown by helicopter to a Dallas hospital with head trauma.
Sherman Police Sergeant Charles Smith said, "The main thing is when you drop off one side of the road or the other, just take your foot off the gas and gradually get yourself back on the road and don't yank the steering wheel one way or the other. That's what causes you to lose control and start rolling."
David Clark, 17, of Sherman, Laura Rodriguez, 18, the driver, and a 15-year-old Denison girl were taken to Wilson N. Jones with non-lifethreatening injuries.