The driver of a Lamborghini that killed 15-year-old pedestrian Sophia Naismith in Adelaide's west has a previous conviction for street racing and has been issued with 18 expiation notices since 2002, a court has heard.

Key points: Sophia Naismith was fatally struck by a Lamborghini in June this year

Sophia Naismith was fatally struck by a Lamborghini in June this year The driver, Alexander Campbell has asked the court to allow him to drive

The driver, Alexander Campbell has asked the court to allow him to drive His lawyer says it's difficult for Mr Campbell's wife to drive him to work due to her pregnancy

Alexander Campbell appeared in the Adelaide Magistrates Court on Tuesday to vary the conditions of his bail, which had prevented him from driving a vehicle.

Mr Campbell's lawyer Craig Caldicott asked for his bail to be altered so he could drive, saying he needed to get to and from work and take his heavily-pregnant wife to medical appointments.

He said his wife was due to give birth on November 8.

"He does work as a technician — [his wife] has been driving him to and from work and it's now difficult because she's eight-and-a-half months pregnant," he said.

"I don't want him to get apprehended for breaching his bail."

Mr Caldicott said there was no suggestion that alcohol, drugs, speed or inattention were involved in the crash on June 22.

Mr Campbell was charged over the death of Sophia Naismith, who was hit along with her friend Jordyn Callea in front of the House of Tien restaurant on Morphett Road, Glengowrie, on June 22.

He was charged with causing death by dangerous driving and causing serious injury by dangerous driving.

The application was opposed by prosecutors, who told the court that Mr Campbell had a "poor" driving history.

Prosecutor said he posed 'a risk to other road users'

The court was told that Mr Campbell had been issued with 18 expiation notices since 2002 and was convicted for street racing in Salisbury Plains in 2010.

Alexander Campbell (right) outside court after his first appearance earlier this year. ( ABC News )

"Police are concerned he poses a risk to other road users," the prosecutor said.

She said there were issues around "dangerous and reckless driving" which resulted in the death of Ms Naismith and the injury to her friend.

Magistrate Simon Smart found middle ground, only allowing Mr Campbell to drive for the purpose of taking his wife to medical appointments.

Mr Campbell will reappear in court in January.

He is yet to enter a plea.