Metro Tunnel
The Metro Tunnel (sometimes also known as the Melbourne Metro Rail Project or the Metro Rail Capacity Project) is a metropolitan rail infrastructure project currently under construction in Melbourne, Australia. It includes the construction of twin 9-kilometre rail tunnels between South Kensington station (north west of the Melbourne City Centre) and South Yarra (in the south east) with five new underground stations. The southern portal for the tunnel is to be located to the south of South Yarra station. As a result, the tunnel will connect the Pakenham and Cranbourne lines with the Sunbury line, and allow these lines to bypass Flinders Street station and the City Loop while still stopping in the Melbourne central business district.
Melbourne Metro 2
Among the projects envisaged for Stage 3 – the five-year period after the completion of the Metro Tunnel – was the creation of another end-to-end line with a tunnel from Clifton Hill to Southern Cross. The NDPMR suggested that the tunnel would provide the additional capacity needed to serve the booming patronage on the South Morang, as well as providing additional space in the existing Clifton Hill tunnel of the City Loop so that a new line to Doncaster could be accommodated alongside Mernda line services. The NDPMR also recommended that the tunnel be extended in Stage 4 from Southern Cross to a new station at Fishermans Bend, with a view to further expansion to Newport and the Werribee line.