Delays are expected on the westbound carriageway of the #A14 near #Stowmarket.
The blockage is near to junction 49 with the #A1308.
A Nissan X-Trail towing a caravan collided with the central reservation and is currently on its side.
Suffolk Police say there are no major injuries and a recovery vehicle is on its way.
As a result of both lanes being blocked the lay by on the road is being used for the traffic flow.
Highways England say the road should get back to normal at around 2.45pm.
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