# The Railways (Interoperability) (High-Speed) Regulations 2002, Paragraph 1: Infrastructure


(a) The infrastructure of the trans-European high-speed rail system shall be that on the lines of the trans-European transport network identified in the framework of the guidelines referred to in Article 129c of the Treaty :
those specially built for high-speed travel,
those specially upgraded for high-speed travel.
They may include connecting lines, in particular junctions of new lines or lines upgraded for high-speed with town centre stations located on them, on which speeds must take account of local conditions.
(b) High-speed lines shall comprise:
specially built high-speed lines equipped for speeds generally equal to or greater than 250 km/h,
specially upgraded high-speed lines equipped for speeds of the order of 200 km/h,
specially upgraded high-speed lines which have special features as a result of topographical, relief or town-planning constraints, on which the speed must be adapted to each case.

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Source: https://www.legislation.gov.uk/uksi/2002/1166/schedule/1/paragraph/1 (the official version)
Page: https://openlegislation.uk/railways-interoperability-high-speed-regulations-2002/schedule-1/paragraph-1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.