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EN 12966

Variable, vertical road traffic signs

EN 12966

· Part 1: Variable message signs VMS · Part 2: VMS, Initial Type Testing · Part 3: VMS, Factory Production Control

Challenges in the future

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EUROPEAN STANDARDS

· WHY DO WE HAVE THEM? · To remove barriers to trade throughout the Common Market.

CE MARKING

By making a product which complies with the harmonised standard, the manufacturer can place the CE mark on the product. This enables the manufacturer to place the product in the market for sale.

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Challenges of EN12966

How are European Standards written?

STANDARDS STRUCTURE

European Commission CEN Technical Committees Working Groups Task Groups

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· Under a contract between the European Commission and CEN (Comité Européen de Normalisation). · Through Technical Committees, Working Groups and Task Groups of CEN.

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CEN

· Made up of the National Standards Bodies of members. These are the national standards bodies of: · Norway, Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Portugal, Spain, Sweden, Switzerland and the United Kingdom

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TECHNICAL COMMITTEES

Comprise representatives of National Standards Bodies. The Technical Committee for Road Equipment is TC 226 and the secretariat for this TC is held by the French National Standards Body AFNOR

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WORKING AND TASK GROUPS

Comprise experts in the subject or part of the proposed standard. They should not promote commercial or national interests and serve in a personal capacity. Secretariats for WG's held by various National Standards Bodies. Task Groups have no secretariat.

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STYLE OF PRODUCT STANDARD

The Standard specifies the performance required of the product NOT how to make it. This leaves the manufacturer free to choose design, materials and manufacturing method.

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FORMAT OF STANDARD

Foreword Introduction Scope Normative references Definitions Dimensions & tolerances. Performance requirements · Test methods · Marking, labelling & product information · Evaluation of conformity

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FOREWORD

· Says which body prepared the Standard. EN12966: TC226 "Road equipment" · Describes the parts of the Standard. · Specifies which of the annexes are normative and which informative.

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· · · · · ·

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INTRODUCTION

· Mentions who the likely users are and how the Standard may be used. EN12966: Road Authorities and Private Developers who wish to use VMS Used for type approval and certification testing

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SCOPE

· Describes what is and what is not included in the Standard.

EN12966: - Continuous signs similar to fixed signs with variable messages; see EN12899-1 - Discontinuous signs using individual elements to create various messages on the same sign face Not covered: gantries, temporary VMS, signal heads, sizes and shapes of VMS, Control units, ..

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NORMATIVE REFERENCES

TERMS, DEFINITIONS, SYMBOLS AND ABBREVIATIONS

A list of documents referred to in the text.

· Not always possible to be explicit. Sometimes the same symbol is used in a Standard and the meaning has to be derived from the context. e.g. for entrance angle and luminance factor in the signs standard. · Commas in place of decimal points.

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Challenges of EN12966

DIMENSIONS & TOLERANCES

Dimensions are little used as performance is the prime parameter

PERFORMANCE REQUIREMENTS

This section is setting down how the product is to perform and the test(s) to be applied to verify this performance. It contains different performance levels, or classes, for the same characteristic, to reflect actual or desired operating conditions. e.g. temperature or beam width

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PERFORMANCE CLASSES

· It is vitally important, when specifying a product, that the performance class required for each characteristic is specified.

· It is no longer satisfactory to specify, say, VMS to EN 12966-1. · This will result in a purchase of a product with minimum performance

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PERFORMANCE CLASSES

· In the Vertical road signs standard (prEN 12966-1) there are different performance characteristics each with several performance classes. · When writing a purchasing specification it is essential to specify which class is required.

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EXAMPLES OF PERFORMANCE LEVELS

RESISTANCE TO HORIZONTAL LOADS

· The following examples have been taken from prEN 12966-1, the Standard for vertical road signs ­ Part 1 Variable message signs

· · · ·

WINDLOADS DYNAMIC SNOW LOADS TEMPORARY BENDING DEFLECTION TEMPORARY TORSION DEFLECTION

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Windloads

· Eight levels:· · · · · · · · WL0 - No performance determined WL1 - 0,40 kN.m-2 WL2 - 0,60 kN.m-2 WL3 - 0,80 kN.m-2 WL4 - 1,00 kN.m-2 WL5 - 1,20 kN.m-2 WL6 - 1,40 kN.m-2 WL7 - 1,60 kN.m-2

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Dynamic snow loads

· Added to resist loads from snow blowers. · DSL0 - No performance determined · DSL1 - 1,5 kN.m-2 · DSL2 - 2,5 kN.m-2 · DSL3 - 3,0 kN.m-2 · DSL4 - 4,0 kN.m-2

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Maximum temporary bending deflection · · · · · · · TBD0 - No performance determined TBD1 - 2 mm.m-1 TBD2 - 5 mm.m-1 TBD3 - 10 mm.m-1 TBD4 - 25 mm.m-1 TBD5 - 50 mm.m-1 TBD6 - 100 mm.m-1

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Maximum temporary torsion deflection · · · · · · · TDT0 - No performance determined TDT1 - 0,02 degrees.m TDT2 - 0,.6 degrees.m TDT3 - 0,11 degrees.m TDT4 - 0,29 degrees.m TDT5 - 0,57 degrees.m TDT6 - 1,15 degrees.m

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Impact resistance

· Impact test shall be in compliance with EN 60598 (see chapter 8.3.5) Impact tests shall be conducted on test modules of VMS using a steel ball of 50 mm diameter with a mass of 0,51 kg dropped from a height h (1,3 m) to produce an impact energy of 6,5 Nm.

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VISIBILITY CHARACTERISTICS

· · · · · Chromaticity co-ordinates Luminance Luminance ratio Beam width Uniformity

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Chromaticity co-ordinates

· Two levels:· C1 see table 2 on chapter 7.2 · C2 see table 3 on chapter 7.2

Luminance

· Three levels:- different levels on different colours e.g.white (see table 4a to 4f on chapter 7.3) · L1 > 3,100 cd/m² · L2 > 6,200 cd/m² · L3 > 12,400 cd/m² · L3(*)> 12,400 cd/m², advanced visibility under low sun conditions

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Low Sun

Luminance ratio

· Two levels:- R1 and R2 different values on different colours e.g.white (see table 5 on chapter 7.4) · R1 >5 · R2 > 10

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Set up for measurement of luminance and luminance ratio

solar simulator

Beam width

B1 B2 B3

-30 -15 -10 -5 0 5 10 15 30 -5 -30 -15 -10 -5 0 5 10 15 30 -5 -30 -15 -10 -5 0 5 10 15 30 -5

VMS / Test Modul

10° ± 0.1 5° ± 0.1 for L3(*)

Ref erenzaxis

-30 -15 -10 -5 0 5 10 15 30

B4

-10

A

0.5° 3°

B5 B6

-30 -15 -10 -5 0 5 10 15 30 -5

Luminance meter

-30 -15 -10 -5 0 5 10 15 30

The ratio of luminance emitted from the sign in the ON state compared to the luminance in the OFF state. Luminance ratio shall be calculated as follows: LR = (La-Lb) / Lb La is the measured luminance of the sign in the ON-state when under external illumination; Lb is the measured luminance of the sign in the OFF-state when under external illumination. Challenges of EN12966

-10 -30 -15 -10 -5 0 5 10 15 30

B7

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Uniformity

· Uniformity shall be in compliance with chapter 7.6:

For the luminous intensities of any individual element of the VMS / test module the ratio of the average output from the highest 12% of the elements, to the lowest 12%, shall be less then 3:1. The ratio of the average output from the highest 4% of the elements, to the lowest 4%, shall be less then 5:1.

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DURABILITY

· · · · Temperature Resistance to pollution Resistance to chemical actions Degrees of protection provided by enclosures · Vibration resistance

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Temperature

· Three levels:(see table 8 on chapter 8.2.1) · T1 -15°C < T1 < +60°C · T2 -25°C < T2 < +55°C · T3 -40°C < T3 < +40°C

Resistance to pollution

· Four levels:(see chapter 8.2.2) · D1 ­ D4

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Resistance to chemical actions

· Resistance to chemical action shall be in compliance with chapter 8.2.3

Degrees of protection provided by enclosures

· Three levels:(see table 9 of chapter 8.2.4)

· P1 (IP45) · P2 (IP55) · P3 (IP66)

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Vibration resistance

· Vibration resistance to chemical action shall be in compliance with chapter 8.3.6

REMINDER

· It is vitally important, when specifying a product, that the performance class is specified.

· It is no longer satisfactory to specify, say, VMS to EN 12966-1. · This will result in a purchase of a product with minimum performance

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EN 12966

SUMMARY

· Check to see if the scope covers the product

Status

· 1990 Start of discussions to harmonise existing National Standards under TC226 · 1997 Draft prEN12966 was released · 1998 First inquiry, Lots of remarks · 1998 Work Group 3.1 was divided in two Task groups, optical and environmental performance

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· It is vitally important, when specifying a product, that the required performance classes for each characteristic are specified.

Challenges of EN12966

EN 12966

Status

continued

QUESTIONS?

· Nov. 2001 WG 3.1 finalises the Part 1 of EN 12966, Internal Inquiry by TC226 · Feb. 2002 WG 3.1 finalises Part 2 and Part 3 · Part 1 will go for 2nd inquiry (3 Month) · Part 2 and 3 go for 1st inquiry (6 Month) · Inquiries did not start yet, documents are still at TC226, Central Management Committee · After Inquiries and agreement in comments there will be the formal vote

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