Two men and a woman were seriously injured in a crash between a lorry and a car on Sunday.
Lincolnshire Police are appealing for witnesses to the collision on the A1 north bound near Long Bennington.
A lorry and a blue VW Passat crashed at around 1am on April 14, which resulted in multiple injuries.
Officers closed off a major section of the road for several hours.
Anyone who witnessed the crash and has dashcam footage is being urged to call 101, quoting incident 23 of April 14.