Standard
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AS 2144:2014
[Superseded]Traffic signal lanterns
This Standard specifies requirements for the design, construction and performance of traffic signal lanterns that use light emitting diode (LED) light sources and are intended to control the movement of vehicles, including bicycles, and pedestrians. It does not apply to the external control equipment that may be necessary for the functioning of the lanterns.
Published: 21/10/2014
Pages: 66
Table of contents
Cited references
Content history
Table of contents
Header
About this publication
Preface
Foreword
1 Scope and general
1.1 Scope
1.2 Referenced documents
1.3 Definitions
1.4 Marking
2 Signal colours and displays
2.1 Signal colours
2.2 Signal displays
3 Photometric performance
3.1 General
3.2 Appearance of vehicular aspects with a circular display
3.3 Luminous intensity distribution of vehicular aspects with a circular display
3.3.1 Background technical information
3.3.2 General conditions and exceptions
3.3.2.1 Matters independent of means of installation
3.3.2.2 Matters relevant to installation
3.3.3 Vehicular aspects with a circular display for 5 mm LED aspects
3.3.4 Vehicular aspects with a circular display for other technologies
3.4 Appearance of vehicular aspects that display symbols
3.4.1 General
3.4.2 Light sources—no diffuser
3.4.3 Light sources—diffuser fitted to aspect
3.5 Luminance distribution of vehicular aspects that display symbols
3.5.1 Background technical information
3.5.2 Luminance
3.6 Appearance of pedestrian and bicycle aspects that display symbols
3.7 Luminance distribution of pedestrian and bicycle aspects that display symbols
3.8 Veiling reflections
3.9 Sun-phantom
3.9.1 Intrinsic sun-phantom
3.9.2 Performance of removable anti-sun-phantom devices
4 Mechanical and physical features and properties
4.1 General arrangement
4.1.1 Size and arrangement of aspects
4.1.2 Mounting facilities
4.1.3 Access to optical system
4.1.4 Provision for adjustment
4.1.5 Controlling dimensions for vehicular lanterns
4.2 Mass of lantern aspects
4.3 Sealing of optical system
4.4 Materials and methods of construction
4.5 Surface finish
4.6 Weather resistance
4.6.1 Drainage facilities
4.6.2 Required protection
4.7 Operating temperatures
4.8 Environmental tests
5 Electrical requirements
5.1 Compliance with AS/NZS 3100
5.2 Supply voltage
5.2.1 Low-voltage (LV) operation
5.2.2 Extra low-voltage (ELV) operation
5.2.3 Dual voltage operation
5.2.4 D.C. voltage operation
5.3 Provision of connection to supply
5.3.1 Supply conductors
5.3.2 Terminals for the connection of supply conductors
5.4 Built-in transformers
5.5 Design and general
5.5.1 Separation of aspects
5.5.2 Off voltage
5.5.3 Provision for aspect monitoring
5.5.3.1 Current waveform
5.5.3.2 Power factor
5.5.3.3 Minimum power consumption
5.5.4 Shut down mode
5.5.5 Dimming
5.5.6 Electromagnetic compatibility
5.5.6.1 Immunity
5.5.6.2 Electromagnetic emissions
5.6 Components and construction
5.6.1 Derating
5.6.2 Drive current
6 Operational requirements
6.1 General
6.2 Light output states
6.3 Signal switching response times
6.4 Progressive failure of LEDs
6.5 Dimming of aspects
7 Optical system components and ancillary devices
7.1 Assembly of optical system
7.2 Properties of optical components
7.2.1 Material and construction
7.2.2 Colour stability
7.2.3 Thermal characteristics
7.3 LED arrays
7.4 Display of symbols
7.5 Visors and louvres
7.6 Target boards (For vehicular lanterns)
7.7 Anti-sun-phantom devices
Appendix A
Appendix B
Appendix C
Appendix D
D1 General test conditions
D1.1 Lantern
D1.2 Test voltage and current
D1.3 Arrangement of the lantern
D2 Calibration and measurement conditions
D2.1 General
D2.2 References for measurements
D2.3 Stray light
D2.4 Additional conditions and procedures
D2.4.1 Temperature requirements
D2.4.2 Normalization of results—Measurements required
D2.4.2.1 Measurements required for yellow aspects only
D2.4.2.2 Measurements required for all aspects
D2.4.3 Normalization of results—Calculations required
D2.4.3.1 Temperature correction factor—All aspect colours
D2.4.3.2 One minute correction factor—Yellow aspects only
D3 Measurement procedures
D3.1 Determination of beam axis
D3.2 Chromaticity
D3.3 Luminous intensity
D3.4 Luminance
D3.4.1 Diffused aspects that display symbols
D3.4.2 Vehicular aspects that display symbols and are not fitted with a diffuser
D3.5 Sun-phantom
D3.5.1 Measurements of intrinsic sun-phantom
D3.5.2 Performance of anti-sun-phantom devices
D3.6 Veiling reflection
D3.6.1 General
D3.6.2 Measurement set-up
D3.6.3 Measurement procedure
D3.6.4 Results
Appendix E
E1 Scaling factor
E2 Example derivations of required initial axial luminous intensities for 5 mm LEDs
E2.1 LED general purpose red aspect
E2.2 LED general purpose green aspect
E2.3 LED general purpose yellow aspect
Appendix F
F1 Scope
F2 Dimensions for visors
F3 Dimensions for target board attachment
Appendix G
Cited references in this standard
[Current]
Environmental testing, Part 2.14: Tests - Test N: Change of temperature (IEC 60068-2-14:2023, MOD)
[Superseded]
Hot-dip galvanized coatings on threaded fasteners (ISO metric coarse thread series)
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