Railways in Melbourne
In February 2015, the State Government established the Melbourne Metro Rail Authority to oversee planning for new twin 9-kilometre rail tunnels through the central city between South Kensington station and South Yarra. The new Metro Tunnel will have five new underground stations and connect the Pakenham and Cranbourne lines with the Sunbury line, creating a new route through the CBD as an alternative to the City Loop. New underground stations will be created at Arden, Parkville, Domain and two new CBD stations, State Library and Town Hall. Enabling works were underway by 2016 and major construction work on the tunnel and stations began in 2017.The project has an estimated cost of $11 billion and is scheduled to be complete by 2025.
Metro Tunnel
The need for an overhaul of the existing commuter rail network was first discussed in the early 2000s as unprecedented population growth began to place significant pressure on existing rail infrastructure and constraints on the inner core of the network as it approached capacity. Other problems faced by the network in the first decade of the 21st century included inefficient operations which had developed during years of low patronage, and a loss of corporate memory, caused in part by the privatisation of rail services in the late 1990s, which limited the flexibility of planners in dealing with the burgeoning passenger numbers. Consequently, a large number of services were experiencing major overcrowding in peak periods. A series of planning documents released during the early 2000s, including "Melbourne 2030" (2002), "Linking Melbourne" (2004) and "Meeting Our Transport Challenges" (2006) identified that significant capacity constraints existed in the central core and on the Dandenong corridor, but did not propose any significant capital works in the city centre, instead suggesting that the issues could be resolved by relatively minor operational changes and construction of a third track to Dandenong.