During the German occupation of Norway as part of the Second World War, the Wehrmacht wanted a railway route past Trondheim which was guarded against sabotage. They decided that the best way to do this was to build a tunnel under the neighborhood of Tyholt. However, construction of the tunnel took much longer than expected, so instead the Wehrmacht started laying railway tracks in the streets in Trondheim. However, neither of the two lines were completed by the time of German capitulation on 8 May 1945.