Melbourne Airport Rail is a rail link under construction from the Melbourne CBD to Melbourne Airport at Tullamarine. Since October 2022 the project has also been branded as SRL Airport. The rail link is to run through the under-construction Metro Tunnel, running 27 km from the airport to Town Hall station in the city centre with 12 km of new track between the airport and Sunshine station. The link will be a new branch of the Melbourne Metro rail network and run High-Capacity Metro Trains at a 10-minute frequency. The project is being delivered by the Victorian state government agency Rail Projects Victoria.