An 18-year-old car driver went off the road in the Göppingen district and was seriously injured.
Her two passengers were also seriously injured, a police spokesman said on Tuesday.
Wäschenbeuren - The young woman was out at Wäschenbeuren on Monday when she hit the unpaved hard shoulder with her car.
When she counter-steered strongly, the car skidded, overturned and finally landed on the roof next to the road.
All three women were taken to hospitals.
dpa