ARTC also maintains the NSW rural branch lines under contract. Other railways continue to be integrated, although access to their infrastructure is generally required under National Competition Policy principles agreed by the Federal, State and Territory governments: Queensland – Queensland Rail Tasmania – Pacific National Victorian non-interstate lines – Pacific National Western Australian non-interstate lines – Australian Railroad Group South Australian non-interstate lines – Genesee & Wyoming Australia Tarcoola-Darwin railway – FreightLink Much maintenance of tracks were contracted out. Australian Government funding The Australian Government has provided substantial funding for the upgrading of roads since the 1920s, but it has not regularly funded investment in railways except for its own railway, the Commonwealth Railways, which was established in 1911 to build the standard gauge Trans-Australian Railway between Kalgoorlie and Port Augusta, and to take over the gauge railways between Port Augusta and Oodnadatta (used by the old "Ghan") and the Palmerston and Pine Creek Railway. Commonwealth Railways became part of Australian National Railways in 1975, which was privatised in 1997. Although the Australian Government has considered the funding of railways owned by State Government to be a State responsibility, it has made loans to the States for gauge standardisation projects from the 1920s to the 1970s. From the 1970s to 1996, the Australian Government has provided some grant funding to the States for rail projects. One Nation program Under the Keating government's One Nation program: the Melbourne-Adelaide line was converted to standard gauge in 1995. the gauge Fisherman Islands line to the Port of Brisbane was converted to dual / gauge and extended in parallel with the duplicated passenger line to Dutton Park. a standard gauge link was built to the port at Fremantle. new standard gauge sidings were provided at Adelaide Outer Harbor. a separate freight line was built between Ingleburn and Glenfield as the first stage of what is now known as the Southern Sydney Freight Line. It was extended in 2013 to connect with the Metropolitan Goods line near Sefton with funds provided by the Australian Government under AusLink. the Sydney–Brisbane line was upgraded with longer passing loops, the replacement of wooden trestles with concrete bridges, concrete resleepering, some minor deviations and bank stabilisation. passing loops were extended between Wodonga and Melbourne. Alice Springs to Darwin railway In 2004, the final link in the Adelaide-Darwin rail corridor – the long-awaited 1420 km Alice Springs to Darwin line