TWO people have been charged with dangerous driving after an accident in which two sisters were killed while riding on a car bonnet in South Australia.

Mother-of-two Kelly Jonas, 30, from Eudunda and her 18-year-old sister Lauren Zadow from Renmark were sitting on the bonnet of a white Toyota Celica heading south along the deserted stretch of road when Ms Zadow fell onto the road hitting her head.

The accident happened on the Worlds End Highway at Point Pass, north of Adelaide, at about 11.30pm (CDT) on Friday.

Ms Jonas jumped from the bonnet of the car and rushed to her sister's aid but was hit by an oncoming blue Commodore sedan.

The pair's 19-year-old sister and Ms Jonas's children aged 7 and 5, who were passengers in the car, both witnessed their deaths.

A 16-year-old female driver of the Celica has been charged with cause death by dangerous driving and driving while unlicensed.

Police will also allege the driver of the Commodore, a 34-year-old male from Point Pass, was also unlicensed.

Police Superintendent Linda Fellows said that Ms Jonas and Ms Zadow may have been travelling on the car's bonnet for up to 20 minutes.

"These two deaths did not need to happen, these two deaths were not an accident, these two deaths were preventable,'' she said.

"And I'm at a loss to know what else we can do to get the message across that poor driving behaviour will result in people dying.''

Both people charged have been released on bail and will appear at Clare Magistrates Court on November 15.

The fatalities take South Australia's road toll to 97, three less than at the same time last year.

With AdelaideNow.

