CEN/TR 16978:2016

SLOVENSKI STANDARD
01-december-2016
Železniške naprave - Infrastruktura - Pregled posameznih okvar
Railway applications - Infrastructure - Survey on isolated defects
Bahnanwendungen - Infrastruktur - Überblick von Einzelfehlern
Applications ferroviaires - Infrastructure - Étude relative aux défauts isolés
Ta slovenski standard je istoveten z: CEN/TR 16978:2016
ICS:
45.020 Železniška tehnika na Railway engineering in
splošno general
93.100 Gradnja železnic Construction of railways
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

CEN/TR 16978
TECHNICAL REPORT
RAPPORT TECHNIQUE
October 2016
TECHNISCHER BERICHT
ICS 93.100
English Version
Railway applications - Infrastructure - Survey on isolated
defects
Bahnanwendungen - Infrastruktur - Überblick von
Einzelfehlern
This Technical Report was approved by CEN on 23 May 2016. It has been drawn up by the Technical Committee CEN/TC 256.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2016 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN/TR 16978:2016 E
worldwide for CEN national Members.

Contents Page
European foreword . 4
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Symbols and abbreviations . 6
5 Methodology . 7
5.1 General considerations . 7
5.2 Collected data . 7
5.2.1 Scope of survey. 7
5.2.2 Speed classes. 8
5.2.3 Parameters investigated . 8
5.2.4 Calculation of lengths of exceedances . 9
5.2.5 Data processing . 9
6 Participating networks and involvement . 10
6.1 Participating networks . 10
6.2 Coverage . 10
7 Results . 11
7.1 General remarks . 11
7.2 Results for longitudinal level in D1 . 11
7.3 Results for alignment in D1 . 12
7.4 Results for mean gauge over 100 m . 13
7.5 Results for twist on a base of 3 m . 14
7.6 Results for narrow gauge . 15
7.7 Results for wide gauge . 16
7.8 Results for longitudinal level in domain D2 . 17
7.9 Results for alignment in domain D2 . 18
Annex A (informative) Spread of collected data . 19
A.1 General . 19
A.2 Results for longitudinal level in D1 with V ≤ 80 km/h . 19
A.3 Results for longitudinal level in D1 with 80 km/h < V ≤ 120 km/h . 20
A.4 Results for longitudinal level in D1 with 120 km/h < V ≤ 160 km/h . 21
A.5 Results for longitudinal level in D1 with 160 km/h < V ≤ 230 km/h . 22
A.6 Results for longitudinal level in D1 with 230 km/h < V ≤ 300 km/h . 23
A.7 Results for alignment in D1 with V ≤ 80 km/h . 24
A.8 Results for alignment in D1 with 80 km/h < V ≤ 120 km/h . 25
A.9 Results for alignment in D1 with 120 km/h < V ≤ 160 km/h . 26
A.10 Results for alignment in D1 with 160 km/h < V ≤ 230 km/h . 27
A.11 Results for alignment in D1 with 230 km/h < V ≤ 300 km/h . 28
A.12 Results for mean gauge over 100 m with V ≤ 80 km/h . 29
A.13 Results for mean gauge over 100 m with 80 km/h < V ≤ 120 km/h . 30
A.14 Results for mean gauge over 100 m with 120 km/h < V ≤ 160 km/h . 31
A.15 Results for mean gauge over 100 m with 160 km/h < V ≤ 230 km/h . 32
A.16 Results for mean gauge over 100 m with 230 km/h < V ≤ 300 km/h . 33
A.17 Results for twist on a base of 3 m with V ≤ 80 km/h . 34
A.18 Results for twist on a base of 3 m with 80 km/h < V ≤ 120 km/h . 35
A.19 Results for twist on base of 3 m with 120 km/h < V ≤ 160 km/h . 36
A.20 Results for twist on a base of 3 m with 160 km/h < V ≤ 230 km/h . 37
A.21 Results for twist on a base of 3 m with 230 km/h < V ≤ 300 km/h . 38
A.22 Results for narrow gauge V ≤ 80 km/h . 39
A.23 Results for narrow gauge 80 km/h < V ≤ 120 km/h . 40
A.24 Results for narrow gauge 120 km/h < V ≤ 160 km/h . 41
A.25 Results for narrow gauge 160 km/h < V ≤ 230 km/h . 42
A.26 Results for narrow gauge 230 km/h < V ≤ 300 km/h . 43
A.27 Results for wide gauge V ≤ 80 km/h. 44
A.28 Results for wide gauge 80 km/h < V ≤ 120 km/h . 45
A.29 Results for wide gauge 120 km/h < V ≤ 160 km/h . 46
A.30 Results for wide gauge 160 km/h < V ≤ 230 km/h . 47
A.31 Results for wide gauge 230 km/h < V ≤ 300 km/h . 48
A.32 Results for longitudinal level in domain D2 with 160 km/h < V ≤ 230 km/h . 49
A.33 Results for longitudinal level in domain D2 with 230 km/h < V ≤ 300 km/h . 50
A.34 Results for alignment in domain D2 with 160 km/h < V ≤ 230 km/h . 51
A.35 Results for alignment in domain D2 with 230 km/h < V ≤ 300 km/h . 52
Bibliography . 53

European foreword
This document (CEN/TR 16978:2016) has been prepared by Technical Committee CEN/TC 256
“Railway applications”, the secretariat of which is held by DIN.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN and CENELEC shall not be held responsible for identifying any or all such patent
rights.
Introduction
The Working Group CEN/TC 256 SC1/WG 28 “Railway applications/Infrastructure/Track geometry
quality” conducted a European Survey on Isolated Defects (ESID) in order to support the process of the
development of the EN 13848 series. The goal of the survey was to get an overview of certain
thresholds of selected track geometry parameters in several European networks in terms of Isolated
Defects (ID).
This Technical Report does not include urban rail matters.
1 Scope
This Technical Report describes the methodology used for the survey on Isolated Defects (ID) and gives
the results.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
EN 13848-1, Railway applications — Track — Track geometry quality — Part 1: Characterisation of track
geometry
EN 13848-5:2008+A1:2010, Railway applications — Track — Track geometry quality — Part 5:
Geometric quality levels — Plain line
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
decolouring
algorithm which converts one signal into a different signal
Note 1 to entry: It is used in EN 13848 series to convert a chord measurement signal into a D1 or D2
measurement signal.
3.2
Immediate Action Limit
IAL
value which, if exceeded, requires taking measures to reduce the risk of derailment to an acceptable
level
Note 1 to entry: To reduce the risk of derailment can be done either by closing the line, reducing speed or by
correction of track geometry.
3.3
isolated defect
part of the signal exceeding a given limit such as IAL with at least one sample (data break)
Note 1 to entry: The length of the exceedance is given by the number of samples exceeding the limit. A
minimum length of exceedance may be applied to determine an isolated defect.
4 Symbols and abbreviations
For the purposes of this Technical Report, the following symbols and abbreviations apply.
Table 1 — Symbols and abbreviations
Symbol Designation Unit
AL Alignment mm
D1 Wavelength range 3 m < λ ≤ 25 m m
D2 Wavelength range 25 m < λ ≤ 70 m m
LL Longitudinal level mm
LoE Length of exceedance m
V Speed km/h
NOTE In this Report, AL stands for “alignment” and is not to be confused with AL standing for “alert limit” as
defined in EN 13848–5.
5 Methodology
5.1 General considerations
The objective of the European Survey on Isolated Defects (ESID) is to get an understanding and an
overview concerning isolated defects within European networks. In a first step it was ensured that at
least 6 networks showed interest in participating in this study. The initial idea was to collect the
number of isolated defects which exceed certain threshold levels. A discus
...