Thames Valley Police is appealing for witnesses and dash-cam footage following a road traffic collision on the M1 near Milton Keynes.
At 10.46pm Friday evening (26/1), between junction 13 and 14 of the M1 northbound, a silver Ford Fiesta collided with the rear of a HGV.
The driver of the car, a man in his forties, was taken to hospital, where he sadly died as a result of his injuries.
No arrests have been made.
Investigating officer PC Phil McGlue of the Roads Policing Unit, said: “This is an extremely tragic incident where a man has sadly died whilst driving along the M1.
“My thoughts and the thoughts of all of us at Thames Valley Police are with the family of the man who has died. They are being supported by specially trained family liaison officers.
“I am appealing to anybody who was driving on that stretch of the M1 yesterday evening and who witnessed this incident, to please get in touch with Thames Valley Police.
“I would also urge any drivers to check dash-cam and contact us if it has captured the collision.
“You can contact us by making a report online or by calling 101, quoting reference number 43240040727.”