A heliport is a small airport suitable only for use by helicopters. Heliports typically contain one or more helipads and may have limited facilities such as fuel, lighting, a windsock, or even hangars. In larger towns and cities, customs facilities may be available at a heliport. The early advocates of helicopters hoped that heliports would become widespread, but they have become contentious in urban areas due to the unpleasant noise caused by helicopter traffic.