墨尔本机场铁路项目正面临融资和交付方案的重大不确定性，私人部门正在考虑提交建议以推进这一项目。[1]自本·卡罗尔担任维州总理以来，该项目被列为首要优先事项，这激发了投资者和建筑商探讨以私人资本参与的可能性。[1]从Sunshine到Tullamarine的18个月谈判至今尚未确定最终交付模式。[1]
项目成本预期已大幅攀升。[1]根据三位建筑行业消息人士的评估，总成本可能达到150亿澳元，[1]而维州政府自2021年以来已估计建筑成本增加约22%。[1]当前政府部门的承诺为维州50亿澳元、联邦70亿澳元，共120亿澳元纳税人资金。[1]项目草案假设铁路将在2035年开通。[1]此外，Keilor East站作为本·卡罗尔当地议员任期内倡议加入的站点，已被视为不可协商的要求。[1]
Victoria's long-delayed airport rail project is drawing renewed interest from private investors and builders exploring ways to fund and deliver the scheme using private capital.[1] Since Ben Carroll assumed office as Victoria's Premier, the airport rail link has been elevated to a top infrastructure priority, sparking discussions among the private sector about potential involvement.[1] The project, which would connect Sunshine to Tullamarine, has been the subject of 18 months of negotiations that have yet to settle on a delivery model, with cost estimates potentially reaching A$15 billion.[1]
The project's financing and construction approach has evolved considerably in recent years. In 2020, the government rejected a market-led proposal called AirRail, which had committed A$7 billion in private investment alongside A$10 billion promised by the federal and state governments at that time.[1] By 2022, project budgets had risen to A$11.5 billion, with a ceiling estimated at A$13 billion, comprising A$5 billion from Victoria and A$7 billion from the federal government—totaling A$12 billion in taxpayer funding.[1] Construction costs have increased by approximately 22 percent since 2021, according to state government estimates released in 2024.[1] Three construction industry sources have indicated that total costs could ultimately reach A$15 billion.[1] The project is currently expected to open in 2035, with Keilor East station—which was added following advocacy by Carroll when he served as a local member of parliament—remaining a non-negotiable requirement.[1]