Alcohol is believed to have been a factor in a crash at Redlynch.
A Porsche convertible lost control on Redlynch Intake Road, crossing into the opposite lane and crashing into a roadworks sign on Sunday.
Traffic was blocked in one lane until police arrived.
Officers arrested a 53-year-old woman who allegedly blew more than four times the legal blood alcohol limit.
Her licence was immediately suspended, and she was charged with driving whilst under the influence of liquor and possessing dangerous drugs.
The 53-year-old is scheduled to appear in the Cairns Magistrates Court on October 12.