The air ambulance landed at Angmering's Oval Raceway after a car flipped over.
West Sussex Fire and Rescue Service also attended the accident at the popular race track near Water Lane, Angmering.
They were called to the scene at 1.33pm to reports a driver was trapped in their car after their vehicle flipped over.
Two fire engines were sent, along with a heavy rescue tender and an officer.
By the time they had arrived, the driver had released themselves from the car, so the firefighters made sure the vehicle was stable before leaving at 2.02pm.
The driver was checked over at the scene by paramedics.
The air ambulance service and South East Coast Ambulance Service have been approached for more information.