A 56-year-old Byrill Creek woman's license suspension was quashed in Murwillumbah Court on Wednesday, despite her speeding more than 40kmh over the limit in a 50kmh zone.

Jennifer Pamela Pearson appeared before Magistrate Michael Dakin to appeal NSW Roads and Maritime Services' decision to suspend her license for three months.

She was convicted of exceeding the speed limit by more than 30kmh, but not more than 45kmh, after being caught by police in May this year speeding 42kmh over the limit.

Pearson said as a single parent living in a rural area the license suspension would affect her family considerably and added she had attended six weeks of the Traffic Offender Program.

"I've realised the error of my ways," she said

The Magistrates response was swift.

"Don't speed," he snapped back.

"The same law applies to me as it does for you."

"Another 3kmh and you would've been off the road for six months."

Magistrate Dakin continued, noting the legislation was deliberately designed to inconvenience offenders and to act as deterrence.

Pearson argued she had been caught out when the 80kmh zone dropped down to a 50kmh zone on approach to a rural town.

Magistrate Dakin said Pearson lived in the area and should have known the speed limit change was approaching.

"Do you drive this fast all the time?" he said.

"It's a gross abandonment of responsibility."

The magistrate said Pearson's age was taken into consideration, but that her driving record was "not blemish free", despite a lack of any recent convictions.

He also noted the majority of license appeals are rejected, but Pearson's case was an exception to the rule.

"She has learned some responsibility," he conceded.

"The suspension is quashed."