维多利亚州新任州长本·卡罗尔（Ben Carroll）宣布，将郊区铁路环线（Suburban Rail Loop）项目的相关基础设施开支削减20亿澳元，以控制成本12。该环线是一个全长90公里的地下快速交通项目2，其隧道贯穿墨尔本的东南、北部和西部中间郊区并包括机场1。由于缺乏整体交通与土地利用规划1、造价高昂、经济效益存在争议且建设周期漫长2，该项目已成为澳大利亚最具争议的基础设施项目之一12。有批评指出，该项目在缺乏透明公众咨询和替代方案评估的情况下推进，并已成为2026年州选举的核心议题1。其最终走向可能取决于11月举行的州选举结果2。相关分析呼吁对维多利亚州大型基建规划流程进行全面改革1。
该项目最初估算成本为300亿至500亿澳元，跨越数十年1。2021年的商业案例估计第一阶段（东段）成本高达345亿澳元1。目前，卡罗尔政府在包含拟议节省的情况下估计项目总成本为333亿澳元，并计划通过技术审查再实现10亿澳元的节省1。相比之下，议会预算办公室对东段和北段的建设成本估算高达964亿澳元2。东段已投资超过330亿澳元2。为落实预算削减，政府取消了部分工程，包括将Box Hill和Glen Waverley的地下车站换乘改为地面换乘，不再建设Clayton的第二个车站入口，以及取消Burwood和Cheltenham的人行天桥2。
2021年的商业案例发现，汽车出行转向该铁路环线所减少的二氧化碳排放量，仅占施工总排放量的0.1%1。东段的首班列车预计于2035年投入运行12。
Victorian Premier Ben Carroll has announced a 2 billion AUD cut to infrastructure spending related to the Suburban Rail Loop (SRL) to control costs 12. The 90-kilometer underground rapid transit project, which will connect the middle suburbs of Melbourne in the east, north, and west, including the airport, has become a highly controversial and central issue for the 2026 state election 12. To achieve these savings, the government will cancel several underground station interchange facilities and other works 2. Specifically, the underground interchanges at Box Hill and Glen Waverley will be converted to surface-level interchanges, a second station entrance at Clayton will be scrapped, and pedestrian bridges at Burwood and Cheltenham have been axed 2.
The project was initially estimated to cost between 30 billion and 50 billion AUD over several decades 1. A 2021 business case estimated the cost of the first stage, SRL East, at up to 34.5 billion AUD, with the first train expected to run in 2035 12. Meanwhile, the Parliamentary Budget Office has estimated the construction costs for the East and North sections alone at 96.4 billion AUD 2. Following the recent cuts and proposed savings, the Carroll government currently estimates the project's overall cost at 33.3 billion AUD, with an additional 1 billion AUD in savings expected from a technical review 1. Furthermore, the SRL East section has already seen an investment of over 33 billion AUD 2.
The project faces criticism for its lack of transparent public consultation, absence of alternative assessments, and insufficient overall transport and land use planning 1. Environmental benefits have also been questioned; the 2021 business case revealed that the reduction in carbon dioxide emissions from shifting car trips to the rail loop would account for merely 0.1% of the total emissions generated during construction 1. As Victoria heads to the polls in November for the 2026 state election, the future of this extraordinarily expensive project remains a major political battleground 12.
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