Police are asking anyone who witnessed the incident or may have dashcam footage to come forward.
Police were called just before 15:00 on Tuesday 12, October to reports of a multi-car incident on the A127 near Upminster.
The vehicles involved were a silver/white Mini Countryman, a silver Audi TT and a black Mercedes CLA200; the driver of the Mini was taken to an east London hospital where she later died.
She has been named as 76-year-old Jacqueline Saunders, from Chingford. Her next of kin are being supported by specialist officers.
Detective Sergeant Mark Palmer, of the Met’s Roads and Transport Policing Command, said: “Our thoughts remain with Jacqueline’s family and we will continue to support them in any way we can.
“We have already spoken to a number of people who were at the scene but I am asking anyone who has information and has not yet come forward to do so.
“We would also appeal to road users on the A127 to check their dashcam footage for anything that may be relevant.”
Anyone with information should call 020 8597 4874, providing the reference CAD 4550/12OCT.
Information can also be provided to Crimestoppers anonymously by calling 0800 555 111.
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