The company HS2 Ltd was set up by the UK government in January 2009 with an initial brief to report on options for High Speed Two, a high-speed railway between London and the West Midlands. This was to include access to London and Birmingham city centres, but with the potential for future extension northwards. Options were also required for intermediate stations and connections to the Great Western main line, the Elizabeth line and High Speed 1. From the outset the Department for Transport and HS2 Ltd applied government business case methodology for preparing and assessing proposals in order to derive the best scheme and to be able to justify the choices during the consultation and approval process. An ‘initial preferred route’ was published in 2010 and, following modification, there was a national public consultation in 2011. The hybrid bill for phase 1 was deposited in November 2013 and royal assent was obtained in February 2017. Throughout, a rigorous process of longlisting possible options, shortlisting and selection was adopted. At each stage the proposals became more detailed as the route, design and mitigations were developed. Consequently, the selection criteria, costing and evaluation also became more detailed and specific.

中文翻译：

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英国HS2铁路：路线选择

HS2 Ltd公司是由英国政府于2009年1月成立的，最初的简报旨在报告有关高速二号列车（伦敦和西米德兰兹郡之间的高速铁路）的选择方案。这包括通往伦敦和伯明翰市中心的通道，但有可能向北延伸。从中间站到大西部干线，伊丽莎白线和高速1线的连接也需要其他选项。从一开始，运输和HS2有限公司就采用政府业务案例方法来准备和评估提案，以得出最佳方案。方案，并能够在咨询和批准过程中证明选择的合理性。2010年发布了“初始首选路线”，经过修改，2011年进行了全国公众咨询。第一阶段的混合法案于2013年11月交存，并于2017年2月获得王室同意。在整个过程中，采用了严格的流程，将可能的选项列入清单，入围和and选。在每个阶段，随着路线，设计和缓解措施的提出，提案变得更加详细。因此，选择标准，成本和评估也变得更加详细和具体。