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.
Railways in Melbourne
By the 1970s, Melbourne's railway network was run down, with the last major investment on the suburban tracks having taken place nearly fifty years earlier. Sixty-year-old Tait trains (known colloquially as "red rattlers") were still in operation, and inner city congestion at Flinders Street led to peak hour delays. In February 1971, the Melbourne Underground Rail Loop Act was passed, establishing the Melbourne Underground Rail Loop Authority (MURLA) to build a connecting series of tunnels from the major stations along the north, south, east and west extremities of the Melbourne CBD. The project ran for over 14 years, opening progressively between 1981 and 1985. The loop was designed and constructed to improve the capacity of Flinders Street and Spencer Street stations to handle suburban trains and to offer easier connections for users.