Another man was also seriously hurt as police appeal for witnesses.
At about 1.40am on Sunday 21 January 2024, emergency services were called to the A1123 Houghton Road between Houghton and St Ives.
A silver Toyota Corolla was involved in a collision with a red Vauxhall Astra and a white Renault Trafic van.
A man in his 50s who was driving the Toyota was taken to Addenbrooke’s Hospital, in Cambridge, where he remains in a critical condition.
The driver of the Renault, a man in his 20s, was taken to Hinchingbrooke Hospital, in Huntingdon, with serious, but not life-threatening, injuries.
Anyone who witnessed the collision or has dashcam footage is being urged to contact Cambridgeshire Police.
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