Division 4.3.2 Maximum service speed of trainsets
United Kingdom
Interoperable trains shall have, in conformity with Article 5(3) of and Annex I to Directive 96/48/EC, a maximum service speed of:
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at least 250 km/h in the case of rolling stock designed for lines specially built for high speed,
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the order of 200 km/h in the case of rolling stock designed for existing lines which have been or are to be specially upgraded.
The maximum service speed is the nominal speed trains are expected to run in daily operation on appropriate sections.
In both cases, it shall be possible for interoperable rolling stock to be worked at their maximum speed (if allowed by the infrastructure) with sufficient acceleration margins (as specified in the following paragraphs).