Drivers are being advised to avoid the A47 between Acle and Blofield due to an obstruction on the road.
The obstruction is near Dell Corner Lane.
It is currently unknown what the obstruction is.
The First X1 and X11 are also being delayed due to the traffic.
Queues are stretching three miles, to Blofield on the eastbound carriageway and to South Walsham Road on the westbound carriageway.
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 The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.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