Traffic is building on the A47 after a BMW broke down on a single carriageway part of the road.
It is causing tailbacks on the Norwich-bound carriageway at Necton, east of Swaffham.
Norfolk Police confirmed they were called at 8.40am.
A spokesperson for the force confirmed there was traffic build-up in the area, and that recovery had been arranged at 9.25am.
Anyone heading eastbound in the area is advised to find an alternative route if possible.
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