Drivers experienced long delays after three cars crashed on the A12 northbound near the Copdock roundabout this evening.
Police were called to the scene at 6.07pm to reports a Ford Ka and two Vauxhall Corsas had collided on the road.
The road was closed for a short time while officers carried out recovery work, and re-opened at around 7.45pm.
One person was treated by paramedics at the scene, but their injuries were not thought to be serious or life-threatening.
Firefighters also attended the scene of the accident, and sent three fire engines to help.
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