Co-operating organizations
Foreword
Specification
1 General
1.1 Scope
1.2 Definitions
2 Optical requirements
2.1 Distribution of light
2.2 Directions of beam
2.3 Arrangement of optical systems
2.4 Green arrow
2.5 Pedestrian signal
2.6 Pedestrian push-button box
2.7 Limits of chromaticity of signals
2.8 Height of signal
3 Constructional requirements
3.1 Signal head assembly
3.2 Signal head
3.3 Optical systems
3.4 Reflector
3.5 Lamp and lamp holder
3.6 Visor
3.7 Post
3.8 Supports for overhead mounted signals
3.9 Equipment housing
3.10 Locks
3.11 Interconnecting cables
3.12 Earthing
3.13 Mains termination
3.14 Post Office equipment
3.15 Safety
3.16 Controller electrical components
3.17 Time switch
3.18 Cable and wiring
3.19 Interchangeability
3.20 Vibration and noise
3.21 Radio interference
3.22 Ambient air temperature
4 Tests
4.1 General
4.2 Timing
4.3 Compliance with customer requirements
4.4 Insulation resistance and electric strength
4.5 Chromaticity
4.6 Luminance measurements (green arrow and red and
      green pedestrian signals)
4.7 Optical systems - conformity of production
4.8 Measurement of phantom effects
Appendices
A Information to be given with enquiry and order
B Typical symbols to be used on plans
Tables
1 Distribution of red and green light for signals on
      normal roads (candelas)
2 Distribution of red and green light for signals on
      high-speed roads (candelas)
3 Minimum values of luminance for green arrow and
      red and green pedestrian signals (candelas per
      square metre)
4 Multiplying factors for adjusting the minimum
      intensity/luminance values shown in Tables 1, 2,
      and 3
Figures
1 Permitted arrangement of green arrow signals
2 Optical system spacings
3 Symbols for pedestrian signals
4 Signal heads
5 Green arrow
6 210 mm signal visors
7 300 mm signal visors
8 Pedestrian crossing control panel
9 Mask for luminance measurements on 300 mm signal