{
  "url": "https://openlegislation.uk/eu-regulation-2009-631/annex/part-IV/chapter-IV/division-4/division-4.8/division-4.8.1",
  "json_url": "https://openlegislation.uk/eu-regulation-2009-631/annex/part-IV/chapter-IV/division-4/division-4.8/division-4.8.1.json",
  "legislation": "eur/2009/631",
  "legislation_title": "Commission Regulation (EC) No 631/2009 of 22 July 2009 laying down detailed rules for the implementation of Annex I to Regulation (EC) No 78/2009 of the European Parliament and of the Council on the type-approval of motor vehicles with regard to the protection of pedestrians and other vulnerable road users, amending Directive 2007/46/EC and repealing Directives 2003/102/EC and 2005/66/EC",
  "legislation_url": "https://openlegislation.uk/eu-regulation-2009-631",
  "path": "annex/part/IV/chapter/IV/division/4/division/4.8/division/4.8.1",
  "kind": "division",
  "number": "4.8.1",
  "heading": null,
  "text": "Calculate the required test value of the impactor mass from:\nM = 2E / V2\nwhere\nM Resultant Mass [kg]\nE Impact Energy [J]\nV Velocity [m/s]\nThe required velocity shall be the value derived in point 4.6. and the energy shall be derived from Figure 6. with reference to the values of frontal protection system leading edge height and frontal protection system lead on the vertical longitudinal plane through the intended point of impact.\nThe impactor mass may be adjusted from the calculated value by ±10 %, provided the required impact velocity is also changed using the above formula to maintain the required impactor kinetic energy.",
  "extent": "E+W+S+N.I.",
  "status": null,
  "version": "current",
  "annotations": [],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/eur/2009/631/annex/part/IV/chapter/IV/division/4/division/4.8/division/4.8.1",
    "retrieved_at": "2026-11-01T14:51:23.654247+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."
}