Severe travel delays on the A12 near Witham, Essex, have been caused by a crash involving two vehicles.
The incident happened on the northbound carriageway, leaving queuing traffic between junction 21 for the B1389 and junction 22.
Congestion is affecting the road to junction 20a.
Motorists are advised to allow extra time for their journeys.
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 The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.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