Emergency services were called to The Bucketts Way - about five kilometres north of the Stroud Hill Road intersection - just before 11am following reports a Ford Ranger had left the road.

Upon arrival, paramedics found the driver - a female aged in her 30s - trapped in the front cabin of the vehicle. She died at the scene.

An 11-year-old girl was able to free herself from the vehicle. She was treated by paramedics for minor injuries and transferred to the John Hunter Hospital.

Officers from Port Stephens-Hunter Police District have established a crime scene and are investigating the circumstances surrounding the crash.

The Bucketts Way has been closed in both directions, with diversions in place for both north and southbound traffic via Johnsons Creek Road.

Delays are expected, police are urging motorists to avoid The Bucketts Way as the road will be closed for some time.

Anyone motorists who were driving along The Bucketts Way around the time of the incident and may have dashcam footage is urged to contact police.

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