Police confirmed earlier today that a lorry driver had died in the collision, that happened at about 2.55pm between junctions 15 and 16.
The driver has not yet been named, but he had been behind the wheel of a Royal Mail lorry when the incident happened.
Following the announcement, Royal Mail paid tribute to him.
A spokesman said; “We were deeply saddened to learn of the death of our colleague who will be greatly missed.
“While we await the findings of the police investigation we will not be commenting further.
“Our thoughts and condolences are with our colleague’s family, friends and colleagues at this very sad time.”