Part of the A47 is closed after a "serious" crash.
The incident happened at Little Fransham near Swaffham at 8.43am today.
A closure is now in place from Station Road in Little Fransham and Dunham Road in Necton.
This is causing delays both ways on the major road and Norfolk Constabulary has warned drivers to avoid the area and plan alternative routes if possible.
A spokesman for the East of England Ambulance Service said: “We were called to a collision between a pedestrian and a car on the A47 in Little Fransham.
"An ambulance, ambulance officer vehicle, rapid response vehicle and the East Anglian Air Ambulance were sent to the scene.
"The pedestrian was airlifted to hospital for further treatment.”
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