Shiona Platt thought she was fine when she got behind the wheel more than three times the legal limit

Her track record was so bad she had an alcohol interlock device in her car. But this serial drunk driver insists she ‘felt fine’ when she crashed, almost killing her passenger.

A drunk 25-year-old with numerous driving convictions crashed through a roundabout while more than three times the legal blood alcohol limit, almost killing her passengers - but she would tell a psychologist she did not feel drunk.

Shiona Platt leaves the Adelaide Magistrates court. Picture: NCA NewsWire/Kelly Barnes

Shiona Platt (right) who is charged with two counts of causing harm by dangerous driving. She is pictured at district court.

Shiona Taylor Platt, now 29, from Craigmore, was only allowed to drive a car with an alcohol interlock device because of previous drink driving offences when she got behind the wheel on March 22, 2019.

She had a blood alcohol reading of .174 at 11.30pm that night.

Platt crashed through a roundabout at the intersection of Kings Road and Andrew Smith Drive before smashing into a tree, leaving a 35-year-old woman in the front passenger seat in a coma.

A male passenger in the back seat was also injured, though not seriously.

Platt pleaded guilty to causing serious harm and harm by dangerous driving.

On Tuesday, Platt, now 35 weeks pregnant, appeared in the District Court where Judge Simon Stretton heard a victim impact statement from the front passenger.

The victim suffered numerous broken bones which required pins and plates to repair as well having her spleen removed.

She said Platt had never shown any remorse for the horror crash.

The court heard the victim still could not move properly three years after the crash.

Carmen Matteo, prosecuting, said Platt had been caught driving at .158 on October 14, 2012 when she was on a provisional licence.

Shiona Platt outside the Adelaide Magistrates Court on charges of causing harm and serious harm by dangerous driving. Picture: NCA NewsWire / Kelly Barnes

For a year in 2014 she was only allowed to drive with an alcohol interlock device – which disables the engine unless a negative alcohol breath test is recorded.

On October 6, 2016 she was charged with driving while suspended and driving an unregistered vehicle.

Two days later she was stopped again and charged with driving with methamphetamines in her system.

On February 14, 2017 she was caught driving .081 while suspended.

Ms Matteo said she needed time to consider a psychological report prepared for Platt and only given to the prosecution this week.

Judge Stretton said he had concerns about the report.

“She said she did not feel inebriated despite being .174," he said.

“I don’t know whether she appreciates the level of her intoxication.”

The case was adjourned for seven weeks to allow Ms Matteo to prepare submissions on the psychological report and for Platt to give birth.

Judge Stretton had a warning for Platt before adjourning the court.

“This was very serious offending and a sentence of imprisonment is one which is very open to the court, especially as a previous suspended sentence did not deter you,” he said.