Melbourne Metro 2 (MM2) is a proposed extension to the Melbourne rail network, consisting of a tunnel from Newport to Clifton Hill via the city centre. Conceived as a follow-up project to the under-construction Metro Tunnel, MM2 would link the Werribee and Mernda suburban rail lines and include stations in the Fishermans Bend development precinct, at Southern Cross and at Parkville, allowing passengers to connect with Metro Tunnel and City Loop lines. Although MM2 has been proposed and refined by a number of government-led and independent reports and proposals, no funding or policy commitment to its planning or construction is in place as of 2019.