The Melbourne Metro Rail Project involves the construction of a 9km-long tunnel within Melbourne, Australia, connecting the Sunbury and Dandenong railway route. The metro rail tunnel will connect to the Dandenong and Sunbury lines at the south-eastern side of South Yarra Station and the western part of South Kensington Station respectively. Melbourne Metro is a vital project for the Government of Victoria. The project is included under the Major Transport Projects Facilitation Act 2009. It will undergo a comprehensive technical and environmental assessment, as well as stakeholder engagement. Estimated to cost $11bn, the Melbourne underground metro is the biggest project of Melbourne railways, after the City Loop. Construction started in 2018 and operations are expected to start in 2025.