Details of diversions are below.
Statement from Essex Police
WE are currently at the scene of a serious collision on the Southend-bound track of the A13 at Thurrock just before the M25 junction.
We were called following reports of a collision between a lorry and a car this morning, Monday 12 October, at around 6.45am.
We have currently closed the road and traffic is being diverted from the carriageway off on to the A1012.
At least two people are thought to be seriously injured and we remain at the scene.
We would like to thank motorists for their patience and understanding while we deal with this incident.