 Numbered Line 1, it is operated by Boreal Bane, a subsidiary of Boreal Norge and is often simply called the Gråkallen Line (Gråkallbanen).Gråkallbanen operates five tram cars, out of a total rolling stock of nine articulated tram cars built by Linke-Hofmann-Busch in 1984.In addition heritage cars from the Trondheim Tramway Museum are available for chartered tours.