Heavy congestion has been reported on the A11 just before Thickthorn roundabout due to a broken down vehicle in the area.
Traffic is building between Wymondham and the Thickthorn roundabout heading northbound towards Norwich.
Norfolk and Suffolk Roads and Armed Policing Team have said in a tweet that recovery is on its way but "traffic is very heavy".
UPDATE: The vehicle has now been removed and all lanes are open on the A11.
For up-to-date information about the county's roads, visit our LIVE Norfolk traffic map.
Join our Norfolk Travel Information group on Facebook for all the latest traffic news in Norfolk.
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules here