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.
Metro Tunnel
Melbourne's original development at a time when railway technology began to emerge as a feasible and efficient mode of transit led to a symbiotic relationship between the CBD and the rail network which grew to surround it. An almost purely radial system of lines, developed largely before 1930, linked the growing suburbs to the economic hub of the city centre, producing a system which supported a daily flow of passengers into and out of the city to work. Despite the increasingly car-oriented developments of the mid-20th century, the suburban rail lines in Melbourne continued to discourage any decentralisation of employment, leaving the city unusually dependent on its central core when compared to cities of similar size globally.