# Commission Decision of 30 May 2002 concerning the technical specification for interoperability relating to the rolling stock subsystem of the trans-European high-speed rail system referred to in Article 6(1) of Directive 96/48/EC (notified under document number C(2002) 1952) (Text with EEA relevance) (2002/735/EC), Division 7.3.3: Maximum pressure variations in tunnels (Section 4.1.13)

Extent: E+W+S+N.I.

To take account of the numerous tunnels with a cross-section of 54 m2 which are traversed at 250 km/h, and those with a cross-section of 82,5 m2 and traversed at 300 km/h, Interoperable trainsets operating on the Italian network shall conform to the following envelope curve:
ΔP0 < or = 1 600 Pa,
ΔP1 < or = 3 000 Pa,
ΔP1 - 0,8ΔP0 < or = ΔP2.
These values are given by:
a ratio between the train and tunnel cross-sections of 0,18,
a service speed of 250 km/h,
If a trainset does not fulfil the values specified above, the operation rules for this train shall be determined by applying the published rules of the infrastructure manager.

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Source: https://www.legislation.gov.uk/eudn/2002/735/annex/division/7/division/7.3/division/7.3.3 (the official version)
Page: https://openlegislation.uk/eu-decision-2002-735/annex/division-7/division-7.3/division-7.3.3
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.