High Quality Content by WIKIPEDIA articles! The Singsaker Line (Norwegian: Singsakerlinjen) of the Trondheim Tramway, Norway, also known as Line 3, served the neighborhoods of Singsaker and Rosenborg between 1927 and 1968. The line demerged from the Elgeseter Line at Studentersamfundet. On the other end of town, line 3 continued to Trondheim Central Station.