Get access to latest Australia railway tenders, rolling stocks tenders and bids. Find business opportunities and government contracts for Australia railway tenders, Australia signaling tenders, Australia locomotive tenders, Australia rolling stock tenders, rail brake tenders, rail car tenders, Australia freight wagon tenders, Australia track construction tenders, track maintenance tenders, Australia rail road tenders, Australia rail construction tenders. Find Australia rail tenders, bids, procurement, RFPs, RFQs, ICBs. Search for Australia rail tenders online. The economy of Australia is a highly developed mixed economy. As of 2021, Australia was the 12th-largest national economy by nominal GDP, the 18th-largest by PPP-adjusted GDP, and was the 25th-largest goods exporter and 20th-largest goods importer. Australia took the record for the longest run of uninterrupted GDP growth in the developed world with the March 2017 financial quarter. It was the 103rd quarter and the 26th year since the country had a technical recession. As of June 2021, the country's GDP was estimated at A$1.98 trillion. The Australian economy is dominated by its service sector, which in 2017 comprised 62.7% of the GDP and employed 78.8% of the labour force. Australia has the tenth-highest total estimated value of natural resources, valued at US$19.9 trillion in 2019. At the height of the mining boom in 2009–10, the total value-added of the mining industry was 8.4% of GDP. Despite the recent decline in the mining sector, the Australian economy had remained resilient and stable and did not experience a recession from 1991 until 2020. Rail transport is a means of transferring passengers and goods on wheeled vehicles running on rails, which are located on tracks. In contrast to road transport, where the vehicles run on a prepared flat surface, rail vehicles (rolling stock) are directionally guided by the tracks on which they run. Tracks usually consist of steel rails, installed on sleepers (ties) set in ballast, on which the rolling stock, usually fitted with metal wheels, moves. Other variations are also possible, such as "slab track", in which the rails are fastened to a concrete foundation resting on a prepared subsurface. Rolling stock in a rail transport system generally encounters lower frictional resistance than rubber-tired road vehicles, so passenger and freight cars (carriages and wagons) can be coupled into longer trains. The operation is carried out by a railway company, providing transport between train stations or freight customer facilities. Power is provided by locomotives which either draw electric power from a railway electrification system or produce their own power, usually by diesel engines or, historically, steam engines. Most tracks are accompanied by a signalling system. Railways are a safe land transport system when compared to other forms of transport.[a] Railway transport is capable of high levels of passenger and cargo utilisation and energy efficiency, but is often less flexible and more capital-intensive than road transport, when lower traffic levels are considered.