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 primary stated aim of the project is to increase capacity within the inner core of the metropolitan network, as well as improving reliability and efficiency. It aims to accomplish this by creating a single, end-to-end metropolitan line between Sunshine in the west and Dandenong in the south-east, linking the existing Sunbury, Cranbourne and Pakenham lines and providing them with a dedicated city centre route. Because this re-routing removes services from two City Loop tunnels, more capacity will theoretically be available for the Werribee, Williamstown, Craigieburn, Upfield, Frankston and Sandringham lines. According to official project estimates, the result is a total capacity increase of 39,000 passengers in the city centre for each peak period.