Thames Valley Police is continuing to investigate the fatal collision on the M40 on Saturday, which involved 33 vehicles.
Police were called at about 7.50am to a report of a multi-vehicle collision on the northbound carriageway between junctions nine (Bicester) and ten (Ardley).
A 65-year-old man from Woking, Surrey died at the scene and one man was taken to the John Radcliffe Hospital in Oxford in a critical condition. He is now in a stable condition but remains in hospital.
Two further people remain in hospital, both in stable conditions.
Sergeant Ashley Hannibal, senior investigating officer from the Serious Collision Investigation Unit, said: “An investigation in to this large-scale collision, in which a man sadly lost his life, was launched on Saturday and is continuing.
“The scene is in the process of being digitally reconstructed to enable investigating officers to establish the positions of the vehicles involved and to piece together the circumstances which resulted in the collision.
“I would like to continue to appeal for witnesses to the collision and to anyone who saw what happened and who has not already spoken to the police, to call us on our non-emergency number 101.
“Witnesses who have left their details with police will be contacted in due course so that their accounts can be obtained.”
If you have any information about the collision which can assist police with their enquiries please call the 24-hour Thames Valley Police enquiry centre on 101 quoting URN 317 14/2.