Rimutaka Tunnel the first fully dieselised line in New Zealand. Today, DBR, DC, DFT and DX class locomotives run the route. There have been proposals to electrify the tunnel and the Wairarapa line as far north as Masterton as an extension of the Wellington suburban electrification. The tunnel was designed to enable catenary to be installed but this has not happened, and the catenary finishes just north of Upper Hutt station. In 2007, Greater Wellington Regional Council rejected a call to electrify the tunnel, on the basis that patronage did not justify the expenditure, and that the tunnel would "have to be
Tauern Railway Tunnel Tauern Railway Tunnel The Tauern Railway Tunnel () in Austria is the longest tunnel of the Tauern Railway crossing the main chain of the Alps. Currently, it has a length of . The highest point of the tunnel, which is also the highest point in all of the railway line, is at above sea level. The tunnel's north entrance is at Böckstein in the valley of Bad Gastein in the state of Salzburg, the south entrance near Mallnitz in Carinthia. Plans for constructing an interconnection railway line between the terminus of the Austrian Western Railway at the city of Salzburg