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RAILWAY APPLICATIONS - TRACK - TRACK ALIGNMENT DESIGN PARAMETERS - TRACK GAUGES 1435 MM AND WIDER - PART 2: SWITCHES AND CROSSINGS AND COMPARABLE ALIGNMENT DESIGN SITUATIONS WITH ABRUPT CHANGES OF CURVATURE
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Superseded date: 24-05-2017
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Published date: 31-12-2009
Publisher: Ente Nazionale Italiano di Unificazione (UNI)
Foreword1 Scope2 Normative references3 Terms and definitions4 Symbols and abbreviations5 General requirements6 Principles for the assessment of abrupt changes of cant deficiency at abrupt changes in curvature7 Circular curves without transition curves8 Combinations of horizontal curves9 Alignment rules and parameters for designing switch and crossing layoutsAnnex A (informative) - General design considerations Annex B (informative) - The installation of switch and crossing layoutsAnnex C (normative) - Rules for converting parameter values for track gauges wider than 1435 mmAnnex D (informative) - Limits of lateral accelerationAnnex E (informative) - The principle of virtual transition Annex F (informative) - A method for calculating the maximum permissible speed at the toe of a non-tangential switch Annex G (informative) - Constraints and risks associated with the use of maximum (or minimum) limiting valuesAnnex H (informative) - The maximum permissible speed of tilting body trains over switch and crossing layoutsAnnex ZA (informative) - Relationship between this European Standard and the Essential Requirements of EU Directive 2008/57/ECBibliography
Describes the rules and values for the track alignment design parameters used to determine the maximum operating speeds over tracks with abrupt changes in curvature and, consequently, abrupt changes of cant deficiency.
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