Police have released CCTV images of two people they would like to speak to after the collision which left one man with life-changing injuries.
The incident happened at about 3pm on Friday 11 November on Litlington Road, between Steeple Morden and Litlington, when a grey Ford C-Max and a blue Saab 93 collided on a sharp bend.
The driver of the Saab, a man in his 40s, suffered life-changing injuries as a result of the collision.
The driver and passenger of the Ford both left the scene.
Anyone who recognises those pictured is asked to contact police as soon as possible using the online webchat function or by calling 101 quoting reference number 35/84979/22.
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