A car and a van collided on the A14 between Copdock and Wherstead this morning.
Emergency services were called to the eastbound carriageway around 8.25am.
The crash involved a Ford Focus car and a Mercedes Vito van.
A police spokesman said the right hand lane was blocked, which caused traffic delays.
One person was assessed by the ambulance service but was not thought to be seriously hurt, a police spokesman said.
The road was clear by 10am.
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