Road restraint systems - Part 4: Performance classes, impact test acceptance criteria and test methods for terminals and transitions of safety barriers

This European Prestandard specifies requirements for the performance of terminals and transitions. It defines performance classes and acceptance criteria for impact tests.

Rückhaltesysteme an Straßen - Teil 4: Leistungsklassen, Abnahmekriterien für Anprallprüfungen und Prüfverfahren für Anfangs-, End- und Übergangskonstruktionen von Schutzeinrichtungen

Diese Europäische Vornorm legt Anforderungen an das Verhalten von Anfangs-, End- und Übergangskonstruk-tionen fest. Ferner werden Leistungsklassen und Abnahmekriterien für Anprallprüfungen definiert.

Dispositifs de retenue routiers - Partie 4: Classes de performance, criteres d'acceptation des essais de choc et méthodes d'essai des extrémités et raccordements des glissieres de sécurité

La présente Prénorme européenne donne les exigences relatives aux performances des extrémités et des raccordements. Elle définit les classes de performance ainsi que les criteres d'acceptation pour les essais de choc.

Oprema cest - 4. del: Razredi uporabnosti, merila za preskušanje ob naletu in preskusne metode za zaključnice in prehodne elemente varnostnih ograj

General Information

Status
Published
Publication Date
31-Aug-2002
Withdrawal Date
24-Sep-2012
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
01-Sep-2002
Due Date
01-Sep-2002
Completion Date
01-Sep-2002

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SLOVENSKI STANDARD
SIST ENV 1317-4:2002
01-september-2002
2SUHPDFHVWGHO5D]UHGLXSRUDEQRVWLPHULOD]DSUHVNXãDQMHREQDOHWXLQ
SUHVNXVQHPHWRGH]D]DNOMXþQLFHLQSUHKRGQHHOHPHQWHYDUQRVWQLKRJUDM

Road restraint systems - Part 4: Performance classes, impact test acceptance criteria

and test methods for terminals and transitions of safety barriers
Rückhaltesysteme an Straßen - Teil 4: Leistungsklassen, Abnahmekriterien für

Anprallprüfungen und Prüfverfahren für Anfangs-, End- und Übergangskonstruktionen

von Schutzeinrichtungen

Dispositifs de retenue routiers - Partie 4: Classes de performance, criteres d'acceptation

des essais de choc et méthodes d'essai des extrémités et raccordements des glissieres

de sécurité
Ta slovenski standard je istoveten z: ENV 1317-4:2001
ICS:
13.200 3UHSUHþHYDQMHQHVUHþLQ Accident and disaster control
NDWDVWURI
93.080.30 Cestna oprema in pomožne Road equipment and
naprave installations
SIST ENV 1317-4:2002 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST ENV 1317-4:2002
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SIST ENV 1317-4:2002
EUROPEAN PRESTANDARD
ENV 1317-4
PRÉNORME EUROPÉENNE
EUROPÄISCHE VORNORM
November 2001
ICS 13.200; 93.080.30
English version
Road restraint systems - Part 4: Performance classes, impact
test acceptance criteria and test methods for terminals and
transitions of safety barriers

Dispositifs de retenue routiers - Partie 4: Classes de Rückhaltesysteme an Straßen - Teil 4: Leistungsklassen,

performance, critères d'acception des essais de choc et Abnahmekriterien für Anprallprüfungen und Prüfverfahren

méthodes d'essai des extrémités et raccordements des für Anfangs-, End- und Übergangskonstruktionen von

glissières de sécurité Schutzeinrichtungen

This European Prestandard (ENV) was approved by CEN on 30 September 2001 as a prospective standard for provisional application.

The period of validity of this ENV is limited initially to three years. After two years the members of CEN will be requested to submit their

comments, particularly on the question whether the ENV can be converted into a European Standard.

CEN members are required to announce the existence of this ENV in the same way as for an EN and to make the ENV available promptly

at national level in an appropriate form. It is permissible to keep conflicting national standards in force (in parallel to the ENV) until the final

decision about the possible conversion of the ENV into an EN is reached.

CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,

Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels

© 2001 CEN All rights of exploitation in any form and by any means reserved Ref. No. ENV 1317-4:2001 E

worldwide for CEN national Members.
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SIST ENV 1317-4:2002
ENV 1317-4:2001 (E)
Contents
page

Foreword ............................................................................................................................................3

Introduction ........................................................................................................................................4

1 Scope...........................................................................................................................................4

2 Normative references...................................................................................................................4

3 Abbreviations ...............................................................................................................................5

4 Terms and definitions...................................................................................................................5

5 Terminals.....................................................................................................................................7

6 Transitions ................................................................................................................................. 14

7 Test methods ............................................................................................................................. 16

Bibliography...................................................................................................................................... 21

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SIST ENV 1317-4:2002
ENV 1317-4:2001 (E)
Foreword

This European Prestandard has been prepared by Technical Committee CEN/TC 226 "Road

equipment", the secretariat of which is held by AFNOR.

This European Prestandard under the general title “Road restraint systems” consists of the following

Parts:
- Part 1: Terminology and general criteria for test methods;

- Part 2: Performance classes, impact test acceptance criteria and test methods for safety barriers;

- Part 3: Performance classes, impact test acceptance criteria and test methods for crash cush-

ions;
The following Parts are not yet available but in course of preparation :

- Part 4: Performance classes, impact test acceptance criteria and test methods for terminals and

transitions of safety barriers;
- Part 5: Product requirements, durability and evaluation of conformity;
- Part 6: Pedestrian restraint systems, pedestrian parapet.

According to the CEN/CENELEC Internal Regulations, the national standards organizations of the

following countries are bound to announce this European Prestandard: Austria, Belgium, Czech

Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Nether-

lands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom.
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SIST ENV 1317-4:2002
ENV 1317-4:2001 (E)
Introduction

The design purpose of safety barriers installed on roads is to contain or to contain and redirect errant

vehicles that either leave the carriage way or are likely to encroach into the path of oncoming

vehicles. EN 1317-2 deals with the impact performance of a safety barrier. However, difficulties arise

in providing adequate safe terminations to the barrier. Consequently, terminals, which are defined as

the beginning and/or end treatment of a safety barrier, are required to have specified impact

performances. A terminal provides a smooth transition from no containment to the containment of the

barrier, without introducing additional hazard for head on impacts.

Problems may also arise in the connection between two different safety barriers having consistent

difference in stiffness. Transitions may be needed, that are required to have specified impact

performances.

The objective of this prestandard is to lead to the harmonization of current National Regulations, to

categorize them into performance classes and help develop new systems and improve existing

systems.

This Part of the prestandard defines the classes of performance required of terminals and transitions

for the restraint.

The impact severity of vehicles in collision with terminals and transitions is rated by the indices

acceleration severity index (ASI), theoretical head impact velocity (THIV) and post-impact head

deceleration (PHD).

Attention is drawn to the fact that the acceptance of a terminal or transition will require the successful

completion of a series of tests (see Tables 1 to 8).

To ensure proper use of this Part of this series, it is essential to consider all the other relevant

documents within the series. Additionally, the quality of manufacture, durability, satisfactory roadside

installation and ease of maintenance are important safety criteria.
1 Scope

This European Prestandard specifies requirements for the performance of terminals and transitions.

It defines performance classes and acceptance criteria for impact tests.
2 Normative references

This European Prestandard incorporates by dated or undated reference, provisions from other

publications. These normative references are cited at the appropriate places in the text, and the

publications are listed hereafter. For dated references, subsequent amendments to or revisions of

any of these publications apply to this European Prestandard only when incorporated in it by

amendments or revisions. For undated references the latest edition of the publication referred to

applies (including amendments).

EN 1317-1:1998, Road restraint systems - Part 1: Terminology and general technical criteria for test

methods.
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SIST ENV 1317-4:2002
ENV 1317-4:2001 (E)

EN 1317-2, Road Restraint Systems - Part 2: Performance classes, impact test acceptance criteria

and test methods for safety barriers.

ISO 6487, Road vehicles - Measurement techniques in impact tests - Instrumentation.

ISO 10392, Road vehicles with two axles - Determination of centre of gravity.
3 Abbreviations
ASI Acceleration severity index;
THIV Theoretical head impact velocity;
PHD Post-impact head deceleration;
VCDI Vehicle cockpit deformation index;
U Terminal on upstream position;
D Terminal on downstream position;
A Terminal on upstream as well as downstream position;
L Length of terminal or transition.
Impact speed classes abbreviations are:
80 80 km/h
100 100 km/h
110 110 km/h
Test vehicle mass codes are:
1 900 kg
2 1300 kg
3 1500 kg
4 Terms and definitions
4.1
terminal
treatment of the beginning and/or the end of a safety barrier

NOTE In addition it can provide an anchorage for the barrier system. The length L of a terminal is the

longitudinal distance from the nose to the end of the terminal, i.e. to the beginning of the barrier. The length of a

terminal is shown diagrammatically in Figure 1 for two alternative shapes.
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SIST ENV 1317-4:2002
ENV 1317-4:2001 (E)
Key
A Barrier
B Terminal
3 Side view
4 Plan view – a)
5 Plan view – b)
Figure 1 – Length of a Terminal with two alternative shapes (a and b)
4.2
system type tested terminal

multiple performance product that can be assembled to form different models from the same set of

components, to obtain different performances, with the same working mechanism for the system and

for its components
4.3
transition

so that interface between two safety barriers of different cross section or different lateral stiffness, the

containment is continuous

NOTE 1 The purpose of transitions is to provide a gradual change from the first to the second barrier, to

prevent the hazards of an abrupt variation. A transition is designed to connect two specified barriers. The

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SIST ENV 1317-4:2002
ENV 1317-4:2001 (E)

length of a transition is the distance between the ends of the two barriers connected by the transition, as shown

schematically in Figure 2.
Key
A Barrier B
B Transition
C Barrier A
Figure 2 – Length of a Transition

NOTE 2 The junction between two barriers having the same cross-section and the same material, and

differing in the working width no more than one class, is not be considered a transition.

4.4
removable barrier section

part of barrier which allow for quick removal and reinstallation for emergency reasons provision may

be required for barrier sections to be temporarily opened, but yet having containment performances

NOTE If such a barrier has a length not exceeding 40 m, it is be considered to be a special transition.

5 Terminals
5.1 Performance classes

Terminals shall be tested in accordance with Table 1. The length of the terminal shall conform to the

design specification and be installed together with sufficient length of safety barrier so as to

demonstrate the performance of the terminal.

A successfully tested installation at a given performance class, shall normally be considered as

having met conditions of lower classes.

NOTE The acceptance tests required for each terminal performance class are reported in Table 1. These are

classified according to an increasing containment capacity.
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SIST ENV 1317-4:2002
ENV 1317-4:2001 (E)
Table 1 - Terminals: vehicle impact test criteria and performance classes
Tests
Performance Location
Approach Approach Vehicle Velocity Test
class
reference mass (kg) (km/h) code
head on nose 1/4
P1 A 2 900 TT 2.1.80
offset to roadside
head on nose 1/4
900
2 80 TT 2.1.80
offset to roadside
P2 A
side, 15° 2/3 L 4 1 300 80 TT 4.2.80
D side, 165° 1/2 L 5 900 80 TT 5.1.80
head on nose 1/4
2 900 100 TT 2.1.100
offset to roadside
head-on centre 1 1 300 100 TT 1.2.100
P3 A
side, 15° 2/3 L 4 1 300 100 TT 4.2.100
D side, 165° 1/2 L 5 900 100 TT 5.1.100
head on nose 1/4
2 900 100 TT 2.1.100
offset to roadside
head-on centre 1 1 500 110 TT 1.3.110
P4 A
side, 15° 2/3 L 4 1 500 110 TT 4.3.110
D side, 165° 1/2 L 5 900 100 TT 5.1.100
Test code notation is as follows:
TT 1 2 100
Test of Approach Test Impact
Terminal vehicle speed
mass

NOTE 1 To avoid ambiguity, the numbering of the approach path in Table 1 and in Figure 3 is the same as in

EN 1317-3; approach 3 is present in EN 1317-3 as test 3 for crash cushions, but it is not required for

Terminals.

NOTE 2 The test with approach 5 is not run for a flared terminal when, at the relevant impact point, the angle

() of the vehicle path to the traffic face of the terminal is less than 5 °.
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SIST ENV 1317-4:2002
ENV 1317-4:2001 (E)
Key
 Approach 1
 Approach 2
 Approach 4
 Approach 5
1 Barrier
2 Terminal
3 1/2 vehicle width
4 1/4 vehicle width

Figure 3 – Vehicle approach paths with two alternative shapes of Terminal (a and b)

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SIST ENV 1317-4:2002
ENV 1317-4:2001 (E)
5.2 Tests for system type tested terminals

A group of models covering a range of performance classes can be derived from a single Parent

Terminal, once the latter has been successfully tested to this prestandard.
Provided that the models in the group:
a) are assembled from the same set of components;
b) have the same product name;
c) have the same working mechanism for the system and for the components,

the group, specified by the drawings of all the models, may be tested as a single product with

multiple performance possibilities. If the tests specified by the group test matrix are passed, the

terminal shall be accepted as a multiple performance product, i.e. each model is accepted in the

relevant performance class.

If the parent Terminal belongs to the highest performance class the test matrix shall be the one

shown in Table 2 or 3, depending on the highest performance class of the group.
Table 2 – Parent Terminal P4
Performance class Tests
P4 All tests
P3 TT 1.2.100
P2 TT 2.1.80
Table 3 – Parent terminal P3 (shape a)
Performance class Tests
P3 All tests
P2 TT 2.1.80

If the parent terminal belongs to the performance class P3 and the group covers also the class P4

the test matrix shall be in accordance with Table 4.
Table 4 – Parent terminal P3 (shape b)
Performance Class Tests
TT 2.1.100
TT 1.3.110
P3 All tests
P2 TT 2.1.80
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SIST ENV 1317-4:2002
ENV 1317-4:2001 (E)
5.3 Impact severity

Vehicle occupant impact severity shall be assessed by the indices ASI and THIV and PHD.

NOTE Vehicle deformation is indicated by the measure of Vehicle Cockpit Deformation Index (VCDI).

The indices are explained in EN 1317-1.
and

Two severity levels are determined in Table 5 as a function of the value of the ASI and THIV

PHD indices.
Table 5 - Terminals: Vehicle Impact Severity Classes
Index values
Impact severity
classes
A THIV < 44 km/h in tests 1 and 2
ASI  1,0 PHD  20 g
THIV < 33 km/h in tests 4 and 5
B THIV < 44 km/h in tests 1 and 2
ASI  1,4 PHD  20 g
THIV < 33 km/h in tests 4 and 5

NOTE 1 Impact severity class A affords a greater level of safety for the occupants of an errant vehicle than

class B and is preferred when
...

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