 From 1 July 2004 NZRC assumed the Crown's responsibilities under the National Rail Access Agreement and adopted the trading name ONTRACK.ONTRACK began Project DART, a major $600 million upgrade of Auckland's suburban railway network, and the Wellington Regional Rail Program (WRRP) to upgrade parts of Wellington's suburban network.These upgrades, along with other projects around the country, followed years of under-investment in the rail infrastructure.