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
Rimutaka Incline were the Tauwharenikau Route, Mr Sinclair’s Route, a coastal route and the Pakuratahi Route. While the government was conducting its surveys, Wellington Province Superintendent William Fitzherbert instructed his Provincial Engineer, Charles O’Neill, to investigate the possibility of a railway through the Rimutaka Valley (the route of the road between Featherston and Upper Hutt), with a tunnel through the dividing range. The survey was carried out between May and 21 July 1871, and O’Neill reported that a tunnel 130 chains (2.6 km) long would be required, with the line rising at 1 in 60 from the Pakuratahi to the tunnel then