Drivers are being advised to avoid the A47 due to a broken down car near Trowse Newton.
The eastbound carriageway is partially blocked due to the breakdown which was first reported at 12.50pm.
A broken-down Land Rover pulling a trailer is blocking the road.
Police are currently on the scene dealing with traffic control.
Queues stretch three miles from Postwick to Trowse Newton.
There are currently delays of around 20 minutes.
For up-to-date information about the county's roads, visit our LIVE Norfolk traffic map.
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