Advertisement A new underground rail line through Melbourneâs south-east â stage one of Laborâs Suburban Rail Loop â will scupper plans for a series of new parks that the Andrews government committed $25 million towards just two years ago. The huge new train line, the most expensive transport project in Victorian history, will also permanently reduce the size of a number of existing parks along its route. Heatherton locals have campaigned for over two decades for a park on land that is now set to be used for a train line and train stabling. Credit:Jason South The first detailed documents of where the $50 billion rail lineâs 26-kilometre first stage will run were released on December 21, the same day Premier Daniel Andrews released the final report of an inquiry into mistakes made in Victoria's hotel quarantine program.