ENV 13803-1:2002

Foreword
1 Scope
2 Terms and definitions
3 Symbols and abbreviations
4 Requirements
  4.1 Background
      4.1.1 Track alignment design parameters
      4.1.2 Parameter quantification
      4.1.3 Traffic categories
  4.2 Recommended limiting values and maximum (or minimum)
      limiting values for track alignment design parameters
      4.2.1 Radius of horizontal curve R
      4.2.2 Cant D
      4.2.3 Cant deficiency I
      4.2.4 Cant excess E
      4.2.5 Rate of change of cant as a function of time
             dD/dt
      4.2.6 Rate of change of cant as a function of length
             dD/dl
      4.2.7 Rate of change of cant deficiency as a function
             of time dI/dt
      4.2.8 Length of alignment elements (circular curves
             and straights) L[i]
      4.2.9 Length of transition curves in the horizontal
             plane L
      4.2.10 Vertical curves
      4.2.11 Radius of vertical curve R[v]
      4.2.12 Vertical acceleration a[v]
Annex A (informative) Supplementary information for track
        alignment design related to shape and length of
        alignment elements
      A.1 Table summarising the properties of different
          transition curves shapes, compared with the
          conventional cubic parabola and clothoid which
          are the bases of the Prestandard
      A.2 The rolling movement of a vehicle and its relation
          with minimum length of alignment elements
      A.3 Further parameters that may be considered for track
          alignment curve design and a progressive system of
          design rules
          A.3.1 Symbols and abbreviations
          A.3.2 Objectives
          A.3.3 Progressive track alignment design
          A.3.4 Application
Annex B (informative) Classification of parameters as a
        function of their influence on safety, comfort and
        economy
      B.1 General
      B.2 Safety
      B.3 Comfort
      B.4 Economy
Annex C (informative) Track resistance to lateral forces
        generated by the rolling stock
      C.1 General
      C.2 The effect of alignment design components on lateral
          forces generated by the rolling stock
          C.2.1 Cant deficiency
          C.2.2 Cant excess
      C.3 The lateral strength limit of a track under loading
          (Prud'homme limit)
      C.4 Factors influencing the resistance to track lateral
          displacement
          C.4.1 Rail profile
          C.4.2 Type of sleeper
          C.4.3 Type of fastening
          C.4.4 Ballast characteristics
          C.4.5 Running speed
          C.4.6 Track consolidation after tamping
          C.4.7 Thermal load in rails
          C.4.8 Proximity of two axles
          C.4.9 Oscillatory axle load variation (vehicle ride
                 quality in the vertical plane)
Annex D (informative) Other criteria to be considered for the
        description of a line classification system
Annex E (informative) Consequences on track resistance, stress
        and fatigue resulting from tilting body train systems
      E.1 General
      E.2 Basic principles applying to tilting body techniques
          E.2.1 Safety requirements
          E.2.2 Comfort requirements
          E.2.3 Economic assessment of the system
      E.3 Current practice rules
      E.4 Current state of development of harmonised criteria
          for tilting trains
Annex F (informative) Rules for converting parameter values
        for track gauges wider than 1435 mm
      F.1 Scope
      F.2 Symbols and abbreviations
      F.3 Basic assumptions and equivalence rules
      F.4 Detailed conversion rules
          F.4.1 Radius of horizontal curve R[1] (4.2.1 of the
                 main body of the Prestandard)
          F.4.2 Cant D[1] (4.2.2 of the main body of the
                 Prestandard)
          F.4.3 Cant deficiency I[1] (4.2.3 of the main body
                 of the Prestandard)
          F.4.4 Cant excess E[1] (4.2.4 of the main body of
                 the Prestandard)
          F.4.5 Rate of change of cant as a function of time
                 dD[1]/dt (4.2.5 of the main body of the
                 Prestandard)
          F.4.6 Rate of change of cant as a function of length
                 dD[1]/dl (4.2.6 of the main body of the
                 Prestandard)
          F.4.7 Rate of change of cant deficiency as a function
                 of time dl[1]/t (4.2.7 of the main body of the
                 Prestandard
          F.4.8 Length of transition curves in the horizontal
                 plane L (4.2.8 of the main body of the
                 Prestandard)
          F.4.9 Length of transition curves in the horizontal
                 plane L (4.2.9 of the main body of the
                 Prestandard)
          F.4.10 Other parameters
Annex G (normative) Track alignment design parameter values for
        track gauges wider than 1435 mm
      G.1 Scope
      G.2 Requirements for a gauge of 1668 mm
          G.2.1 Cant D[1]
          G.2.2 Cant deficiency I[1]
          G.2.3 Rate of change of cant as a function of time
                 dD[1]/dt (mm/s)
          G.2.4 Rate of change of cant as a function o length
                 dD[1]/dl
          G.2.5 Rate of change of cant deficiency as a function
                 of time dl[1]/dt
          G.2.6 Length of alignment elements (circular curves
                 and straights) L[i1]
          G.2.7 Vertical curves
          G.2.8 Radius of vertical curve R[v1]
          G.2.9 Vertical acceleration a[v1]
Annex H (informative) Constraints and risks associated with the
        use of maximum (or minimum) limiting values
Annex I (informative) Recapitulation of the work carried out
        by the ORE B 55 Committee - maximum permissible cant
      I.1 Introduction
      I.2 Criteria for safety against derailment at low speed
          through wheel-climbing
      I.3 Limiting values for track twist
      I.4 Rules applicable to the design of and checks performed
          on new vehicles with regard to their capability of
          coping with track twist values
      I.5 List of reports published by the ORE B 55 Committee
Annex ZA Correspondence between this European Prestandard and
         EC Directives
Bibliography

This European Prestandard specifies the track alignment design parameters, the rules and the values that shall be used to determine the maximum operating speed for both new and existing lines. Alternatively, for a given specified speed, it defines the track alignment design parameters either for a new line or an upgraded line.The track alignment designer is free to specify the values most appropriate for the various parameters, when considering safety, geographical, engineering, historical and economic constraints. These values are defined in the contract document. However, the choice should be such that the selected values are no worse than the maximum (or minimum) limiting values for the safety-related parameters.Whenever necessary, the track alignment designer should take into account any specific requirements of the appropriate national standards.The designer shall endeavour to use the recommended limiting values specified in this European Prestandard and avoid unnecessary use of the maximum (or minimum) limiting values.This European Prestandard applies to main lines with track gauges 1435 mm and wider with mixed or dedicated passenger traffic, running at operating speeds between 80 km/h and 300 km/h. Annex F (informative) describes the conversion rules which can be applied for tracks with gauges wider than 1435 mm. Annex G has a normative character and is to be applied for corresponding specific national conditions.However, the values and conditions stated for this speed range can also be applied to lines where operating speeds are less than 80 km/h, but in this case, more or less restrictive values may need to be used and should be defined in the contract.This European Prestandard does not apply to urban and suburban lines.This European Prestandard also considers the possibility of increasing the performance of line operation, without major alignment modifications, by means of particular rail vehicle types, such as: