Stella Frew, 38, died following the incident on Tonfield Road, Sutton, just before 6pm on Friday.
Police said they believe she got into a white transit van that afternoon and was later involved in a dispute with the driver.
She was given first aid from passers-by, police, paramedics and the air ambulance but was pronounced dead at the scene.
James Martin, 26, of Crawley, West Sussex, has been charged with manslaughter.
He is due to appear at Croydon Magistrates’ Court on Tuesday morning.