A 39-year-old man has been arrested on suspicion of causing death by dangerous driving.
A 30-year-old man from Kent has died following a serious crash on the M40 Northbound in Oxfordshire.
Sixteen fire fighters, police and ambulance crews were called to the scene shortly after 6am, following reports of a collision between a beige Nissan Qashqai and a white Tesla Model 3.
The crash happened between junctions 8a (Wheatley) and 9 (Bicester).
The carriageway was closed northbound for more than 10 hours following the collision.
The man’s next of kin have been informed and are being supported by specially trained officers.
Inspector Gavin Biggs of the Joint Operations Unit for Roads Policing, based at Bicester, said: “Tragically, as a result of this morning’s collision, a man has died at the scene.
“The thoughts of all of Thames Valley Police are with his family at this very sad time.
“I am appealing for anybody who was driving on the M40 between 6am and 6.15am this morning who believes that they witnessed this collision to please make contact with police.
“I would particularly like to hear from anybody who has dash-cam footage from the moments leading upto the collision, so please can I urge drivers to check their footage and contact us if it has picked up anything that can assist this investigation.
“The carriageway remains closed northbound, and is likely to remain shut until mid-afternoon at the earliest."
Anybody with any information should call 101, quoting reference number 43210092008 or make a report online.
The 39-year-old who was arrested is currently in police custody.