A lane of the A14 Orwell Bridge outside Ipswich was blocked due to a collision.
Highways England said on Twitter that the incident happened between junctions 56 and 57 of the westbound carriageway at around 1pm.
Officers from Suffolk police were called to the scene.
The conditions of the motorists involved in the collision are not currently known.
Highways England said in a tweet a short while later that the incident had been cleared.
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