
Metro Tunnel
Underground rail line in Melbourne, Australia

Underground rail line in Melbourne, Australia
The Metro Tunnel (formerly known as Melbourne Metro Rail, shortened to MMR) is an underground heavy rail tunnel forming part of the metropolitan rail network in Melbourne, Victoria, Australia. The tunnel consists of twin 9-kilometre (6 mi) bores running northwest to southeast of Melbourne CBD between South Kensington and South Yarra, incorporating five new underground stations. It links the Pakenham and Cranbourne lines with the Sunbury line via an alignment beneath Swanston Street, forming a high-frequency cross-city rail corridor that bypasses Flinders Street station and the City Loop. A proposed new Airport rail line serving Melbourne Airport and a future connection to Melton are also planned to operate via the Metro Tunnel. The Metro Tunnel project was managed by the Victorian Infrastructure Delivery Authority and was part of the Victorian Government's "Big Build" infrastructure initiative. The project was built for an estimated cost of A$12.8 billion. The project enables the operational...
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