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
Karawanks Tunnel (railway) a higher operating speed inside the tunnel and make the tunnel RoLa - suitable. Despite the fact that the tunnel will only be operated with only one track in the future, this should not be an obstacle in relation to the volume of traffic. The project has a total budget of 115 million euros, divided over the kilometers of each country, Slovenia contributes 50 million euros, Austria 65.3 million euros. The project is financially supported by the European Union within the framework of the Connecting Europe Facility Program. Karawanks Tunnel (railway) The Karawanks Tunnel (, ) is the fourth longest