A French motorist appears to have driven on from a crash in Queenstown despite her car's airbags being deployed.

The 30-year-old woman was found on Morven Ferry Rd, near Arrowtown, about 9.30pm on Friday.

A member of the public concerned about her condition called police and St John ambulance.

Senior Sergeant Paula Enoka said officers found the car with its airbags opened and a flat front tyre.

Advertisement

"Talking to her, tracking back, it appears she crashed into fence posts at Arrow Junction."

That was about 1km away, although Ms Enoka said it was possible the driver had been involved in another crash along the way.

The woman was taken to Queenstown's Lake District Hospital for observation and a blood alcohol test.

Ms Enoka said she showed "signs of intoxication", and police are waiting for the results.

The officer praised the actions of the member of the public.

"It could have been a much more serious outcome for her, in terms of her condition, had there been a delay."

The woman was discharged from hospital with no injuries after a medical assessment.