Sebring International Raceway is a motor racing track located near Sebring, Florida. The circuit occupies part of Hendricks Field airport, which is currently used for commercial and general aviation. It hosted the United States Grand Prix in 1959, and since 1950 it has been the location for the 12 Hours of Sebring, one of the most anticipated races of the IMSA championship. The main feature of the track, resulting from sharing part of the area with the airport, are the concrete sections with numerous joints that scrape the bottom of the cars.