The metro tunnel will free up space in the city loop to run more trains to and from the suburbs, by taking our busiest train lines through a new tunnel under the city.
That means more trains, more often across Victoria, with a less crowded and more reliable train network.
Works to build the massive 9km twin rail tunnels and five new underground stations is underway.
The Sunbury and Cranbourne/Pakenham lines will be upgraded with next-generation high-capacity signalling to allow more trains to run more often and more reliably.
