Drug affected mother jailed over deadly car crash

A drug-affected mother who crashed into a truck on Adelaide's Hills freeway, killing her four-year-old daughter, has been sentenced to three years in jail.

Kylie Anne Hie's daughter Charlotte died when her mother's van crashed into the back of a truck while trying to overtake it on the South Eastern Freeway at Leawood Gardens in November 2013.

Charlotte was in a child seat which was not properly anchored.

Hie, 34, was driving from Mount Gambier to Adelaide after attending a funeral.

She was seen driving dangerously before the crash, and was high on methylamphetamine.

Hie pleaded guilty to an aggravated count of causing death by dangerous driving.

She later asked to withdraw that plea, but was refused permission by the court.

Hie was jailed for three years, with a two year and three month non-parole period.

She was also disqualified from driving for 10 years.