The A14 was closed in both directions after emergency services called to a serious crash.
Police were alerted to the crash on the eastbound carriageway near Creeting St Mary and Needham Market at about 6.45am on Monday.
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A spokesman for Suffolk police said a full closure had been put in place in the eastbound carriageway and lane two of the westbound carriageway was also closed.
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The road had fully reopened by the afternoon.
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