The Mayor of Redlands City Council, Karen Williams, has admitted to driving after drinking "several glasses of wine" on Thursday night.
The ABC understands Ms Williams was taken to hospital with minor injuries after her car crashed that night.
A Queensland police spokesperson said investigations were continuing into a crash where a station wagon "left the road and struck a tree" at the intersection of Queen and Wellington Streets at Cleveland" around 9pm on Thursday.
"The driver, a 55-year-old woman, suffered minor injuries and was transported to hospital for treatment," the spokesperson said.
Police said no-one else was injured in the accident and that investigations were continuing.
Earlier in the day, the Redlands City Council budget for 2022-23 was handed down.
'Deeply sorry for my actions'
In a statement provided to the ABC, Ms Williams said she "made a serious error in judgement and drove after drinking several glasses of wine".
"I am deeply sorry for my actions and am incredibly thankful no-one else was involved or injured," Ms Williams said.
"I will be seeking counselling and will continue to assist police in their enquiries."
Ms Williams has recently been in the media after commenting on the sentencing of an 18-year-old convicted of manslaughter over the 2021 deaths of Matthew Field and Kate Leadbetter.
The then-17-year-old was under the influence of drugs and alcohol when he struck Mr Field and Ms Leadbetter with a speeding, stolen four-wheel-drive in Alexandra Hills.
The teen — who cannot be named as he was convicted as a juvenile — was handed a 10-year sentence for more than a dozen charges including two counts of manslaughter.
However, after considering the teen's early guilty plea, his steps toward rehabilitation, and "genuine remorse and shame", the judge ordered he should be released from custody after serving six years.
Ms Williams was the principal petitioner supporting a petition for the sentence of the teen charged over their deaths to be appealed.
The petition called for the case to be appealed on the grounds his sentence of six years was "manifestly inadequate".
It also called for stronger youth justice laws, including reinstating breach of bail as an offence.
