WARNING: GRAPHIC CONTENT
A 20-year-old woman has been airlifted to the Royal Hobart Hospital after a single vehicle crash at Longford.
The woman was travelling with her 25-year-old brother and his three-year-old child when the car veered off the road onto gravel.
Police believe this caused the driver to lose control with the car then skidding across both sides of Pateena Road, narrowly missing a vehicle travelling the other direction, before colliding with a tree.
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The woman suffered critical head injuries and had to be cut from the vehicle. She was attended to by ambulance officers at the scene before being airlifted to the Royal Hobart for further care.
Inspector Scott Flude said the driver and his son were assessed at the scene and did not suffer serious injuries.
He said initial investigations suggested a medical episode caused the crash.
"We are still investigating ... but there is a strong belief at the moment that the driver may have suffered a medical episode and that has caused that vehicle to wander off the road way and subsequently lost control in the gravel," Inspector Flude said.
"It doesn't appear that speed or drugs were involved in this crash."
Inspector Flude said this was a timely reminder for people to drive safely heading into the Christmas period.
"We've got an increased presence of police on the roads at this time of year and we just ask people to drive to the conditions," he said.
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