A crash involving a Volkswagen is causing chaos on the Orwell Bridge and A14, with traffic queueing back to the A12 at Copdock.
Police were called to the scene of a crash that happened about 5.45pm, reportedly involving three vehicles.
A spokesman for Suffolk Constabulary said that when they arrived at the scene, only two cars were involved - a white Volkswagen and a Citoren.
One lane of the eastbound carriageway was blocked, heading to Felixstowe.
Traffic built back to junction 55 at Copdock, with slow traffic on the westbound carriageway at the scene of the accident.
At 6.30pm the road was clear and traffic began to ease.
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