Traffic is queueing for more than seven miles on the A14 near Newmarket after a lorry broke down.
One lane of the eastbound carriageway was closed at about 5.30pm this evening while recovery and repair teams made their way to the vehicle.
National Highways have since confirmed that the lane has reopened but are warning motorists of lengthy delays.
For up-to-date information about the county's roads, visit our LIVE Suffolk traffic map.
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