Police have named the man who died in a four-vehicle collision on the A43 between Northampton and Kettering on Friday.
The Nissan Vanette in which he was a passenger collided with a tipper lorry on the A43 at Broughton.
Police say he was Nicholas Davore Hartshorn, 33, of Park Road South, Wigston, Leicester.
Another man was seriously hurt in the accident, which closed the road for several hours.
Officers from the Collision Investigation Team are appealing for witnesses who saw the collision to come forward.
"The road was extremely busy at the time and in fact it is believed that the first minor collision happened in heavy traffic, but very few witnesses to the collision have so far come forward," said a spokesman.
Police are asking anyone who was on the A43 on Thursday morning and saw any part of this collision to contact them on 08453 700700 or on the Drivewatch Hotline on 0800 174615.