Witnesses are being sought following a serious collision on the A14 eastbound near Welford, Northamptonshire, on Monday, 10 October.
The accident happened at about 3.45pm on the eastbound carriageway, between the M1/M6 interchange and Junction 1, when a Ford Transit van collided with a Volkswagen Polo.
The driver of the Polo, a man in his 40s, was taken to University Hospital Coventry with serious injuries.
Police have asked any witnesses of the incident, and anyone who may have dashcam footage, to email CollisionAppeals@northants.police.uk or alternatively call the Drivewatch Hotline on 0800 174615 or Northamptonshire Police on 101.
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