A section of the A11 had to be closed after an earlier accident and a detour had to be set up.
The A11 is currently closed due to an accident south between the A47 near Cringleford, Norwich and the B1135, Wymondham.
Norfolk Police officers were called to the scene.
Road users are advised to allow additional time for their journeys and are asked to leave the A11 and take the B1172 at the Thickthorn roundabout.
However, a section of the B1172 is also closed as a roundabout is being built there. Therefore, drivers are warned to be extra careful.
At the Norwich Road roundabout, drivers can take the first exit onto the B1135 and then rejoin the A11.
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It is not yet known when the road will reopen.