Police are warning of significant traffic disruption in Sudbury until about 4pm today.
Suffolk Police were contacted at 9am this morning following reports a lorry needed assistance to avoid a low bridge on Cross Street.
Drivers coming into Sudbury from Essex are advised to avoid using the A131 where possible.
Lorries joining the A131 after Braintree are currently advised to pick up the A120 at Braintree signed towards Colchester, and from that point to follow directions to Sudbury on the A134. They should not take the B1508, which is currently closed for roadworks.
Traffic is moving slowly and local diversions are in place in Sudbury town centre, but drivers are being advised that delays are anticipated until at least 4pm.
Police remain at the scene.