The A146 was closed following a three-vehicle crash on the Hales roundabout near Loddon.
The collision happened at 9.24am.
Emergency services including police, fire and ambulance attended the scene.
Norfolk Police has tweeted about the incident asking drivers to avoid the area.
Bus services were diverted due to the crash.
Border Bus diverted to Poringland and cannot serve Stockton, Hales or Thurton in either direction.
Traffic was queueing in both directions between Norwich Road and High Bungay Road.
The road has since reopened.
For up-to-date information about the county's roads, visit our LIVE Norfolk traffic map.
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