The driver of the van is in hospital in a serious condition
Essex Police began pursuing a van when it failed to stop for them prior to entering the A13 shortly before 2.35am on Friday, 25 November.
The van began driving in the wrong direction down the Essex-bound carriageway and collided with a black Toyota Prius.
The female passenger of the Prius was pronounced dead at the scene. Her next of kin have been informed.
The driver of the van, a 39-year-old man, was taken to hospital for treatment where he remains in a serious condition.
He has also been arrested on suspicion of causing death by dangerous driving and failing to stop for police.
The Independent Office for Police Conduct will investigate the circumstances surrounding the incident and the involvement of the Essex Police officers prior to the crash.
“This is a terrible incident that has resulted in the tragic death of a young woman,” said Detective Sergeant Mike Rapp.
“I am appealing for anyone who was driving on the A13 in the Dagenham area shortly after 02:30hrs and saw the events unfolding as this van drove on the wrong side of the Essex-bound carriageway to contact us.
“There is footage circulating on social media of this incident that we are aware of; I would ask anyone in possession of footage to think about the family of the woman who has died and consider their feelings before sharing content. I would also urge anyone who has images or footage of the incident to provide these to police so that we can build a comprehensive picture of this collision.”
Anyone with information is asked to call the Serious Collision Investigation Unit on 020 8597 4874.
You can also call police on 101 or tweet @MetCC and quote CAD562/25Nov. You can also provide information anonymously to the independent charity Crimestoppers on 0800 555 111.
For more on this story, and the latest on our other local and national news, listen to Time 107.5FM
Tags: Dagenham, A13, Barking and Dagenham, Fatal Collision