New MetroRail was a division of the Public Transport Authority in Western Australia. It was responsible for managing extensions to Perth's railway network. The project doubled Perth's rail network, which is operated by Transperth, and was completed in 2007, after various projects were completed. Costing $1.6 billion, the project was the largest public transport project ever undertaken by the Western Australian government and effectively doubled the size of Perth's railway network. A similar agency Metronet was created in 2017 for future Perth rail extensions.