The Norwich-bound carriageway of the A47 was blocked between Necton and Dereham early this afternoon following an accident between a lorry and a Skoda.
Police were called to the crash between the car and a Scania lorry at Little Fransham at 1.05pm.
Delays built up east-bound because the police were initially unable to move the Skoda and had to wait for help.
A police spokesman said no injuries had been reported, and the other emergency services were not called.
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