She accrued demerit points for negligent driving, speeding and using a mobile phone in separate incidents in a period of less than three years.

The 19-year-old's licence was suspended and she lodged an appeal.

But when the matter came up, her legal representative said she was obligated to tell the court her client had recently been issued with a further infringement notice for using a mobile phone while driving.

The defence submitted that in relation to the negligent driving offence, the woman was a young and inexperienced driver unfamiliar with torrential rain.

She had oversteered in the rain and run into a roundabout and no one was injured, the court heard.

The suspended driver felt she had let her grandmother down and was embarrassed when she told both her grandmother and her employer of the offences, the defence submitted.

She had completed the traffic offenders program and knew the reality was she may lose her licence, the defence said.

"She's learning the hard way and is realising she has to pick up her act," the defence said.

The woman needed her licence for her employment and to take her grandmother to appointments, the court heard.

Relieving magistrate Alexander Mijovich said in the space of 2.5 years the suspended driver had three matters on her record and that he was told there was a fourth.

He accepted the submissions about the negligent driving offence but took a dim view of the other offences.

"Using a mobile phone (when driving) - that's just arrogance," he said.

"And it's the same with speeding."

He said he gave her credit for attending the traffic offenders program but ultimately dismissed the appeal.

The suspension was reduced to two months.

If the woman drove at all in the period, she would be off the road for 12 months, the magistrate said.