Police and rescue crews were called to Peterborough Road in Ailsworth at just after 1pm on Wednesday, where they found one car in a ditch and another blocking a roundabout.
The vehicle in the ditch was being driven by a 50-year-old woman, who had to be cut free. She was taken to Peterborough City Hospital as a precaution but was later arrested for failing to provide a specimen for a breath test.
The driver of the other car was not injured.
A spokesperson for Cambridgeshire Police said: “We were called at just after 1pm yesterday afternoon with reports of a collision in Peterborough Road, Ailsworth.
One vehicle was blocking the road from the roundabout while another was in a ditch.
“The driver of the vehicle in the ditch, a 50-year-old woman from Peterborough, was cut from the vehicle after being trapped. She was taken to hospital as a precaution and later arrested for failing to provide a specimen of breath for analysis. She remains in custody at Thorpe Wood Police Station.
“The other driver was not injured.”
A statement from Cambridgeshire Fire and Rescue Service added: “At 1.20pm on Wednesday (8) crews from Stanground and Dogsthorpe were called to a road traffic collision on the A47 near Ailsworth.
“Firefighters arrived to find a collision involving two vehicles. Using specialist cutting equipment they released a casualty who was left in the care of ambulance crews.
“The crews returned to their stations by 2.55pm.”