The A12 has now reopened following a crash this morning.
Police closed the Ipswich-bound carriageway between junction 27 and 28 just before 10am.
A man has been taken to Colchester General Hospital with minor chest injuries.
The road remained closed while debris was cleared from the road.
Traffic was diverted thriugh Colchester along the A133 and Ipswich Road, causing long delays and tailbacks of about two miles.