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
Dularcha Railway Tunnel with the gazettal of the Dularcha National Park in 1922. The boundaries of the Park were created around the railway line enabling steam train travelling passengers to view a part of Queensland's forests. The place demonstrates rare, uncommon or endangered aspects of Queensland's cultural heritage. The Dularcha Railway Tunnel is significant as one of only two tunnels constructed along the entire North Coast Line and is good example of a concrete lined tunnel constructed for Queensland's narrow-gauge railway lines. The place is important in demonstrating the principal characteristics of a particular class of cultural places. The Dularcha Railway Tunnel is