A man from Towcester was seriously injured in a collision on the A43 on Thursday (November 12).
The crash happened on the A43 near Hulcote, at around 5.50pm.
A grey Honda Civic, driven by a 66-year-old man from Towcester, collided with a blue DAF lorry, driven by a 54-year-old man from Oldbury, West Midlands.
The collision happened at the junction for Hulcote and both vehicles were travelling southbound towards Towcester.
The driver of the Honda Civic was taken to University College Hospital.
Witnesses or anyone with information is asked to call the Northamptonshire Police Drivewatch hotline on 0800 174615.