Police have reopened the A1101 at Burnt Fen after a crash on Sunday left a motorist with serious injuries.
Officers were called to a single-vehicle collision, on Suffolk's border with Cambridgeshire, shortly after 1pm.
The A1101 remained closed overnight while officers conducted an investigation into the incident, with the road only reopening at around 8am on Monday.
Suffolk police confirmed the driver of the vehicle suffered serious injuries and was taken to Addenbrooke's Hospital in Cambridge for treatment.
The extent of motorist's injuries have not been yet been revealed.
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