A lane of the A14 Orwell Bridge outside Ipswich has been cleared after a collision caused traffic jams.
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.
The AA traffic map suggested vehicles were able to pass at an average speed of just 10mph.
As of 3.30pm the road was cleared.
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