Thickthorn interchange roundabout.Picture: ANTONY KELLY (Image: Archant Norfolk 2016)
Heavy traffic is building near the Thickthorn Roundabout following a collision.
Norfolk Police said one lane is open on the southbound lane of the A11 at Thickthorn after reports of a single vehicle collision.
The spokesman said the motorist suffered minor injuries.
A spokesman said; "Police were called to the A11 Southbound between the Thickthorn Roundabout and Wymondham following reports of a single vehicle collision.
"One lane is open. Drivers advised to avoid the area due to heavy traffic."
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