Police were called to the scene of the crash, close to the Primrose Lane junction, shortly before 2.15pm today (Monday). A dark green Ford Focus had collided with traffic lights after the female driver, believed to be in her fifties, suffered a medical condition at the wheel, according to police. She was taken to Hinchingbrooke Hospital with serious injuries. Emergency services are still at the scene and the road remains shut in both directions. Police expect the road to be reopened by 4.30pm.