A 44-year-old Federal woman is in a serious condition at Gold Coast Hospital after a crash on Coolamon Scenic Drive at Coorabell on Thursday night.
Tweed-Byron Local Area Command duty office, Inspector Darren Steel, said the woman was travelling east along the road when the car left the road.
"It hit a guard rail and the car rolled," he said.
"The woman was ejected from the car and the car landed on top of her."
The crash comes less than two weeks after 28-year-old Harlie Denny-O'Rourke of Murwillumbah was killed in a single-car crash on the same stretch of road.
Emergency service workers attended the scene and released the woman from underneath the car.
Westpac Life Saver Rescue Helicopter airlifted the woman to the Gold Coast Hospital, and it is understood she suffered head injuries, internal injuries and a number of fractures.
Insp Steel said they were still waiting to interview the woman to determine the cause of the crash.
But he said after early investigations, police believed she may not have been wearing a seatbelt.
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