A male driver and his two passengers were taken to hospital after their car left the road and collided with a lamppost on the roundabout linking the A10 and Amey Recycling Centre.
The collision, involving a black Nissan Almera, happened at about 8.15pm on the roundabout linking the A10 and Amey Recycling Centre.
Emergency services attended the scene and the driver, a man in his 20s, was taken to Addenbrooke's Hospital with serious but not life threatening injuries.
Two passengers in the vehicle, a man and woman who are both in their 20s, were also taken to Addenbrooke's as a precaution.
No other vehicles were involved.
Sgt Aaron Murphy said: "We are keen to speak to anybody who witnessed the crash or the car being driven in the moments leading up to it."
Anyone who has dash-cam footage of the collision or information about the incident is asked to call police on 101 quoting Op Muskett or report online at www.cambs.police.uk/report
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