Police are investigating a serious single vehicle crash that occurred about 2:15am today on West Tamar Road, just north of Kings Bridge. A green Ford Falcon that was travelling south towards the Launceston CBD collided with the centre barrier.

The 18-year-old driver, who was the sole occupant of the vehicle, was trapped for some time before being freed by emergency services. He was taken to the Launceston General Hospital in a serious condition.

The crash blocked this section of West Tamar Road for several hours, with traffic diversions being put in place.

The cause of the crash is still under investigation. Anyone with information or dash cam footage is asked to contact police on 131 444 or report through Crime Stoppers Tasmania at crimestopperstas.com.au or on 1800 333 000.