A collision on the A15 near Market Deeping has left a woman seriously injured.
Lincolnshire Police confirmed the woman was airlifted to hospital, but her situation is not understood to be life threatening.
The incident, which involved just one vehicle, was reported at 1.35pm on Friday, April 24 near Kates Bridge, Thetford.
The road has been partially closed and police are warning drivers that it is expected to be closed for the remainder of the afternoon.
The areas closed will be the A15 King Street and the A151/A15 towards Bourne.