{
  "url": "https://openlegislation.uk/eu-decision-2002-735/annex/division-4/division-4.1/division-4.1.1",
  "json_url": "https://openlegislation.uk/eu-decision-2002-735/annex/division-4/division-4.1/division-4.1.1.json",
  "legislation": "eudn/2002/735",
  "legislation_title": "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)",
  "legislation_url": "https://openlegislation.uk/eu-decision-2002-735",
  "path": "annex/division/4/division/4.1/division/4.1.1",
  "kind": "division",
  "number": "4.1.1",
  "heading": "Maximum track forces (BP4)",
  "text": "In addition to basic parameter BP10 that deals with the static axle load, the characteristics that allow the maximum track forces to be defined are:\nthe dynamic load applied to the rail by the wheel,\nthe transverse forces exerted on the track by the train.\n(a) Dynamic load\nThe maximum vertical load to be exerted by the wheels on the rail (dynamic load of wheel Q) is defined as follows:\nfor rolling stock designed to operate on specially constructed high-speed lines at speeds equal to or greater than 250 km/h, the following values apply:\nV (km/h)\nQ (kN)\nV = 250\n180\n250 < V ≤ 300\n170\nV > 300\n160\nfor rolling stock designed to operate on specially upgraded high-speed lines at speeds of the order of 200 km/h:\nthe technical rules in use on these lines are applicable.\n(b) Transverse track forces\nInteroperable rolling stock shall comply with the Prud'homme criteria for the maximum transverse force ΣY defined as follows:\ntotal dynamic maximal transverse effort exercised by an axle on the track:\nΣΥ max = 10 + P 3 kN, P being the static load on the axle in kN. This result of this formula defines the limit of adhesion between the track tie and the ballast under the influence of transverse dynamic efforts,\nquotient of the transverse and vertical efforts of a wheel:\nΥ/Q lim = 0,8, Y and Q expressing respectively transverse dynamic effort and vertical effort exercised by a wheel on the rail. This limit characterizes the risk of a wheel climb on the rail.\n(c) Longitudinal track forces\nLongitudinal forces exerted on the track by the rolling stock shall always be less than those corresponding to an acceleration or a deceleration of 2,5 m/s2.",
  "extent": "E+W+S+N.I.",
  "status": null,
  "version": "current",
  "annotations": [
    {
      "type": "F",
      "label": "F1",
      "text": "Substituted by Commission Decision of 23 July 2012 amending Decisions 2002/731/EC, 2002/732/EC, 2002/733/EC, 2002/735/EC and 2006/66/EC and repealing Decision 2002/730/EC concerning technical specifications for interoperability (notified under document C(2012) 4982) (Text with EEA relevance) (2012/462/EU)."
    }
  ],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/eudn/2002/735/annex/division/4/division/4.1/division/4.1.1",
    "retrieved_at": "2026-11-01T15:18:29.829862+00:00"
  },
  "licence": "Open Government Licence v3.0",
  "licence_url": "https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/",
  "attribution": "Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives."
}