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Birmingham City Council

Street Lighting - Lighting and other Design Considerations

Street Lighting

Index

General
Lighting Design Requirements
Design Sheets

General

  1. The Authority will define the appropriate road hierarchy and lighting class for all lighting designs on both the existing Project Network and new developments.
  2. Lighting designs shall be designed in accordance with the general principles, relevant performance requirements and design procedures of BS EN 13201:2003 and BS 5489-1:2003 and incorporate the ‘Specific Lighting Design Standards” for the Birmingham Highways Management and Maintenance PFI (AMEY)
  3. Lighting class requirements for both new and proposed Project Roads shall be determined by the Network Hierarchy as detailed in Table 1 on Page 99 of (Carriageway Hierarchy section) of the Well Maintained Highways – Code of Practice for Highway Maintenance.
  4. All Lighting Points shall be fitted with control devices to enable individual luminaires to be remotely controlled and managed by the PFI Contractors Central Management System (Telensa). For avoidance of doubt this shall include dimmable fully electronic ballast and a Telensa Telecell with dimming control.
  5. All light sources for road lighting on the Link Road and Local Access Road Network shall be fitted with LED light sources. The luminaire shall be the WRTL STELA Square or Wide (350mA) shall be fitted to all for other areas more specific requirements apply and these are indicated below.
  6. All Lighting Columns shall be sited at the rear of a Verge or Footway and provide compliance with the minimum column setbacks as detailed in BS 5489-1:2003
  7. Non-Standard equipment shall replaced on a like for like basis
  8. Where the dimming of street lighting is used or approved in accordance with Appendix C, the amended lighting requirements shall take cognisance of Technical Report 27 (Code of Practice for Variable Light Levels for Highways), issued by the Institution of Lighting Professionals.


Lighting Design Requirements

  1. Strategic Route and Main Distributor Network and Secondary Distributor Network
    • The lighting class requirements for Strategic Routes, Main Distributor Network and the Secondary Distributor Network are detailed in Table 1 (below).
    • Light sources shall be high output High Pressure Sodium lamps with a minimum colour rendering equal to or greater than Ra 20
    • All luminaires shall be WRTL Airtrace 2
    • BS EN 13201 and BS 5489 make recommendations regarding the scale of lighting in relation to the surroundings. The choice of mounting height shall take account of these recommendations. In particular, the mounting height shall not exceed the corresponding maximum height of a Lighting Column identified in column 5 of Table 1 (below).
    • Where a Conflict Area exists on the relevant type of Project Road, Lighting Points of the corresponding Lighting Class identified in column 4 of Table 1 (below) shall apply
    • All Luminaires used on Project Roads that are classed as category 2, 3a and 3b shall have a luminous intensity class of G3 or greater
    • All Luminaires used on roundabouts shall have a luminous intensity class of G5 or greater.

      Table 1: Strategic Route and Main Distribution Network and Secondary Distributor Network
      Category Type of Project Road Lighting Class Conflict Area Max. Height of a Lighting Column (m)
      2 Strategic Routes on the Strategic Route and Main Distributor Network ME2 CE1 12
      3a Main Distributor Routes on the Strategic Route and Main Distributor Network ME3a CE2 12
      3b Secondary Distributor Routes on the Secondary Distributor Network ME3c CE2 10

  2. Link Road Network and Local Access Road Network
    • The lighting class requirements for the Link Road Network and local Access Road Network are detailed in Table 2 (below)
    • Light sources shall be LED with a minimum colour rendering equal to or in excess of Ra 60
    • All luminaires shall be WRTL STELA Square or Wide (350mA)
    • BS EN 13201 and BS 5489 make recommendations regarding the scale of lighting in relation to the surroundings. The choice of mounting height shall take account these recommendations. In particular, the mounting height shall not exceed the corresponding maximum height of a Lighting Column identified in column 4 of Table 2 (below)
    • Luminaires shall have adequate optical control to minimise light pollution and obtrusive light to properties and shall conform to the E3 environmental zone obtrusive light limitations, defined in the Lighting Engineers Guidance Notes for the Reduction of Lighting Pollution.

      Table 2: Link Road and Local Access Road Network
      Category Type of Project Road Lighting Class
      Lamp Ra >60
      Max. Height of a Lighting Column (m)
      4a Link Routes on the Link Road Network S3 8
      4b Local Access Routes on the Local Access Road Network S4 8
      Note: This table also applies to parts of PFI District 11 (City Centre).

  3. City Centre and District Centres
    • Special requirements apply to lighting installed in the City Centre and District Centres. Drawings detailing the extents of the City Centre and District Centres are available to view at the Service Providers premises on request
    • The lighting class requirements for City Centre and District Centres are detailed in Table 3 (below)
    • Light sources shall have a colour-rendering index equal to or in excess of Ra60
    • The style of lighting column and luminaire shall be agreed with the Authority / Service Provider prior to any design work commencing
    • The mounting heights of Lighting Points shall not exceed the corresponding maximum height of a Lighting Column identified in
    • column 5 of Table 3 (below)
    • All Luminaires shall have a luminous intensity class of G4 or greater except where such Luminaires are affixed to Non-Standard (heritage) street lighting.

      Table 3: City Centre and District Centres
      Areas of the Project Network Lighting Class
      City Centre and District Centres which are mixed vehicular and pedestrian areas CE 1
      City Centre and District Centres which are wholly pedestrian areas CE 2
      City Centre and District Centres which are pedestrian subway areas CE 0
      All other pedestrian subway areas on the Project Network CE 2

  4. Footpaths and Cycle Tracks
    • BS EN 13201 and BS 5489 make recommendations regarding the scale of lighting in relation to the surroundings. The choice of mounting height shall take account of these recommendations. In particular, the mounting heights of Lighting Points shall not exceed the corresponding maximum height of a Lighting Column identified in column 5 of Table 4 (below)
    • The lighting class requirements for Footpaths and Cycle Tracks are detailed in Table 4 (below)
    • Light sources shall be LED with a minimum colour rendering equal to or in excess of Ra 60
    • All luminaires shall be WRTL STELA Square or Wide (350mA)
    • Luminaires shall have adequate optical control to minimise light pollution and obtrusive light to properties and shall conform to the E3 environmental zone obtrusive light limitations, defined in the Lighting Engineers Guidance Notes for the Reduction of Lighting Pollution. lighting.

      Table 4: Footpaths and Cycle Tracks
      Group Types of Footpaths and Cycle Tracks Lighting Class
      more than 60 less than 60
      1 Footpaths and Cycle Tracks that are on the Prestige, Primary and Secondary Walking and Cycling Route Network S2 S3
      2

      Footpaths and Cycle Tracks that are on Link Walking and Cycling Routes on the Link and Local Access Walking and Cycling Route Network

      S2 S3
      3

      Footpaths and Cycle Tracks that are on [Local Access Walking and Cycling Routes on the Link and Local Access Walking and Cycling Route Network.]

      S S5

  5. CCTV
    • The designer shall identify during the site survey all Project Network parts covered by CCTV and confirm with the Authority that the area is a designated CCTV area and the extents
    • all lighting in designated CCTV areas shall be lit to Lighting Class CE1
    • all Luminaires shall have a luminous intensity class of G4 or greater
    • light sources shall have a colour rendering index equal to or in excess of Ra60
    • light output shall be reduced by one lighting class between the hours of 12.00am and 4.00am.

  6. Conservation Areas
    Where any proposals affect lighting in Conservation Areas then the designer shall agree with the Authority prior to any design work commencing:-
    • the type of equipment required
    • the luminous intensity class for the luminaires
    • where standard luminaires are required the designer shall use the equipment specified in these standards based on the hierarchy of the road and associated lighting class
    • all light sources shall have a colour rendering index equal to or in excess of Ra60
    • light output shall be reduced by one lighting class between the hours of 12.00am and 4.00am

  7. Trees
    Where and to the extent the Designer is either proposing or replacing Lighting Points that are affected by the presence of trees the Service Provider shall, when designing such Lighting follow requirements detailed below:-
    • in accordance with clause 5.2 – Siting in BS 5489-1.2003 in new streets where trees are to be planted, the lighting should be designed first and the planting sites fixed afterwards. Careful siting of trees can help to minimize interference with the performance of the lighting by the foliage and eliminate any future requirements for unnecessary pruning
    • minimise the need for unnecessary pruning and damage to any trees throughout the expected life of the replacement Lighting Point
    • take into account the inevitable growth in height and spread of any relevant trees
    • and consult an arboriculturist (where appropriate) in relation to the above issues

  8. Other Lighting Standards
    • When dimmed, Full Spectrum Light Sources shall be deemed to have a colour rendering index (Ra) of =60.

  9. Conflict Areas
    • Conflict areas shall have the same meaning as that in Appendix 0/1 – Definitions. Where a Conflict Area exists on the relevant type of Project Road, Lighting Points of the corresponding Lighting Class identified in column 4 of Table 5 (below) shall apply
    • Where routes meet to which different lighting classes have been applied, the higher class shall determine the class at the Conflict Area
    • The extent of each Conflict Area shall be carefully considered to ensure that conflicting traffic and pedestrian movements are catered for and shall be the total area of the highway between highway boundaries, including carriageway, verge, cycle track and footway and shall include any splitter islands or pedestrian refuges or marked pedestrian routes or pedestrian crossings adjacent to the junction
    • The longitudinal extent of the Conflict Area shall be determined by ‘Safe stopping distances’ based on the enforceable speed limit for the highest hierarchy of road. Table 5 (below) shows the safe stopping distances and extents.

      Table 5: Extent of Conflict Area
      Type Extent of Conflict Area
      Without crossing facilities With crossing facilities
      T Junction Safe stopping distance Stopping distance plus 5 metres beyond crossing
      Staggered Junction Safe stopping distance Stopping distance plus 5 metres beyond crossing
      Cross Roads Safe stopping distance Stopping distance 5 metres beyond crossing
      Roundabouts Safe stopping distance Stopping distance plus 5 metres beyond crossing

      For a roundabout, the area of a Conflict Area shall be the total area of the highway between highway boundaries, including carriageway, verge, cycle track and footway. Where vehicles are permitted to travel over the central island, the area of the island shall be included in the calculation, but where vehicles are not so permitted, the island may be excluded. The longitudinal extent of the Conflict Area shall extend from the roundabout along each approach road for a distance of not less thenthan the safe stopping distance from a line continuing the outer circumference of the roundabout carriageway across the mouth of each road.

  10. Pedestrian Crossings
    Zebra crossings and signal controlled crossings shall be in accordance with Institution of Lighting Engineers Technical Report TR 12 – Lighting of Pedestrian Crossings.

    Pedestrian crossings include both signalled controlled crossings and uncontrolled crossings (Zebra’s). Pedestrian crossings shall be lit in accordance with the Institution of Lighting Engineers Technical Report TR12. In summary:-
    • Signal controlled crossings on traffic routes shall be lit to the appropriate ME lighting class using ‘negative contrast’ lighting
    • Zebra crossings shall by lit using ‘positive contrast’ lighting using a light source with a colour rendering of Ra60

    Where ‘positive contrast’ lighting is provided on Zebra crossings supplementary luminaires shall be mounted on an extended beacon pole with the beacon mounted on an offset pole.

  11. Attachments to Lighting Columns and Illuminated Traffic Signs
    Attachments made to Apparatus at the time of installation or in the future shall follow the Authorities attachment procedure. A copy of this procedure can be obtained from the Birmingham City Council. To facilitate such attachments to new lighting columns provided under this Specification, such Lighting columns shall be designed to carry the attachment loads in the  Road Lighting Columns and Brackets (Table 1)  in relation to Signs (additional or otherwise) to be attached. All Attachment loads shall be taken at the most onerous position in relation to door opening and bracket or luminaire orientation.

  12. Lighting periods
    The periods within which the lighting of Apparatus is switched on shall be as required in Table 6 (below).

    Table 6: Lighting Periods
    Type of Lighting Points Lighting activation level
    On street lighting points On at 70 lux and off at 35 lux
    Subway and under bridge lighting points Continuous
    Tunnel or underpass points Continuous, in accordance with BS5489 part 2


  13. Design Maintenance Factors
    The design Maintenance Factors to be used is detailed in the Table 7 (below):-

    Table 7: Design Maintenance Factors
    Initial Design Maintenance Factors
    Lamp Type and Wattage Mounting Height Design Maintenance Factor
    For all LED lamps 6m or less 0.79
    For all LED lamps 7m and above 0.79
    60w CPO-TW 7m and above 0.71
    90w – 140w CPO-TW 7m and above 0.78
    For lamps from 100w – 400w SON-TP 7m and above 0.85
    For lamps from 210w – 310w CDM-Elite 7m and above 0.83
    For all PL-L 6m or less 0.80

Design Sheets

The developer / designer shall produce an outline design sheet at the preliminary design stage complete with all information detailed in Design Sheet Sample 1. This shall be submitted to the Authority for approval prior to the commencement of the scheme design. The developer / designer shall produce a design summary sheet following the completion of the scheme design. The sheet shall include all the information detailed in Design Sheet Sample 2 and be submitted to the Authority for final approval prior to the commencement of works on site. The Design Sheet Samples can be downloaded from the links above.