Two drivers are in hospital, one in a critical condition, after a horror crash on the state's roads Wednesday afternoon.
Police and emergency services were called to The Bucketts Way around 2.40pm after reports of a serious head-on collision east of Gloucester.
One of the drivers was flown by Westpac Rescue Helicopter to John Hunter Hospital in a critical condition, suffering head and pelvic injuries. The second driver - the sole occupant of the other vehicle - was treated at the scene for minor injuries before they were also taken to hospital.
Officers attached to Manning-Great Lakes Police District have established a crime scene and will investigate the circumstances surrounding the crash.
The Bucketts Way will be opened with a contra flow to be put in place, a spokesperson for NSW Police said. Drivers are being urged to avoid the area as extensive delays are expected.
Anyone with information has been urged to contact CrimeStoppers on 1800 333 000.
