A man in his 50s died after a crash between a van and a car on the A1 near Gonerby Moor on Thursday morning.
Another man was also injured and taken to hospital for treatment after the crash at the Marston Toll Bar junction on the A1 at around 6am on August 13.
There were reportedly 10 miles of tailbacks on the A1 between Grantham and Newark.
The carriageway was blocked in both directions, closing the A1 between A52 at Barrowby and Long Bennington. Police confirmed shortly before 3.30pm that the road had reopened.
Lincolnshire Police said next of kin have been informed.