Drivers are facing long delays on the A12 at Martlesham this morning after a JCB broke down near the BT Tower.
Police are currently at the scene and have put a rolling road block in place.
Traffic travelling northbound towards Woodbridge is affected, a police spokesman said, and the vehicle has broken down in the left hand lane.
The incident occurred around 200m from the Bucklesham roundabout, the spokesman added.
According to officers, the vehicle broke down at approximately 11.20am.
Delays are building and it is not clear yet when the rolling road block will clear.
Stay with us for updates on this story as we receive more information.
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules here