The South Dakota Highway Patrol says a 24-year old woman was killed about 5:00 Saturday morning when her car ran off Interstate 90 in the Black Hills about a mile west of Whitewood.
Her name is being withheld pending notification of family
The Highway Patrol says the woman was alone and eastbound when she went off the pavement to the right and into a ditch before eventually colliding with a tree.
She was not wearing a seat belt and was ejected from the car by the impact. She was pronounced dead at the scene.