There were delays on the Orwell Bridge outside Ipswich after a police incident.
Officers were called to called to the incident on the A14 at about 12.05pm on Friday.
Traffic was held in both directions while the incident was dealt with.
Queues were forming as far back as the Copdock Interchange, before the incident was resolved at about 1pm.
An eyewitness said ambulances were also in attendance.
The East of England Ambulance Service has been approached for comment
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 The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.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