The A47 at Dereham is blocked in both directions for the second time today (Friday).
Police and fire crews were called to a two-vehicle crash near the Draytonhall Lane junction at around 3.30pm.
The A47 is currently closed between that junction and the Manor Road junction, causing long delays in and around the town.
It follows a three-car collision between the Grange Road junction and the Draytonhall Lane junction at 9.35am this morning, which saw the A47 closed in both directions for just over two hours.
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