A 97-year-old woman killed in a crash on the M4 in Wiltshire which left three other people with serious injuries had been visiting family, police said.
The collision happened in the early hours of Sunday between Swindon East and Hungerford, near Membury Services.
Marian Armstrong, who was born in Jamaica but who lived in London, was travelling home after visiting her brother and other relatives in Bristol.
The three other people injured in the crash remain in hospital.
Mrs Armstrong's 60-year-old son-in-law who was driving the Audi A4 which collided with a stationary Vauxhall Zafira is in Southmead Hospital in Bristol in a critical condition.
Her 59-year-old daughter who was in the back seat is stable in the Great Western Hospital in Swindon.
The Zafira driver, a man from west London, suffered life-changing injuries and was taken to the John Radcliffe in Oxford for treatment.
"As the driver exited his vehicle he was struck by the Audi travelling in lane three," a police spokesman said.
