Three cars were involved in a crash at Fleet Marston this morning, causing long delays back into Aylesbury.
Police were called just after 7am following a collision involving a Nissan Almera, a Chevrolet and a Ford Fiesta.
One person was taken to Stoke Mandeville Hospital with neck and back pain.
The incident caused a blockage on the road and tailbacks along the A41.
The fire service was called at 7.37am to clean up oil and fluids that had leaked from the cars.