A143 between Bury St Edmunds and Haverhill blocked after 40ft truck trailer overturns
The A143 has been closed both ways between Depden and Chedburgh since about 1pm following the incident
The AA said traffic was 'coping well'.
A Suffolk Police spokesman said the 40ft trailer with a container, carrying dry goods, had 'snapped and separated' from the truck and had overturned, landing on its side into a verge.
There were no injuries.