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.
Mount Victoria Tunnel
The National Land Transport Programme forecasts costs for duplication of Mount Victoria Tunnel at NZ$6.6m for the design phase and $8.8m for property purchases, but no figure for construction of the tunnel. The design and property purchase phases are classified as "Reserve" and are unlikely to proceed until completion of the investigation phase. This means it is almost certain no construction work could commence on duplicating Mount Victoria Tunnel before 2012. Given the dependency of such a project on improvements at the Basin Reserve, it would be fair to assume that any tunnel duplication is dependent on significant capacity improvements to traffic flow around the Basin Reserve.