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
Sydney Harbour railway electricity tunnel constructed by State Rail. The tunnel was a major technological and engineering achievement and was the first such venture to be undertaken in Australia without overseas assistance. It was a major link in the power supply to the railway and tramway system between Sydney and the North Shore and although flooded is an important element of the development of public transport in Sydney. Sydney Harbour railway electricity tunnel was listed on the New South Wales State Heritage Register on 2 April 1999. Sydney Harbour railway electricity tunnel Sydney Harbour railway electricity tunnel is heritage-listed electricity infrastructure running under Sydney Harbour