As Lighting Standards

AS/NZS 1158 LIGHTING FOR ROADS AND PUBLIC
SPACES
AS/NZS 1158.1.1 CATEGEORY ‘V’ LIGHTING

 The objective pf road lighting is to provide a lighted environment that is
conducive to the safe and comfortable movement of vehicular and pedestrian
traffic at night.
 Principle objective of V lighting is to provide Luminance and Luminance
Uniformity of the carriageway surface, glare control, illuminance on
intersection and nominated location, limitation of upward light from luminaires,
a maintenance regime to specified levels.
 There are different categories of lighting.
 V1 for main roads in central and regional centres of capitals and major cities
with mixed vehicle and pedestrian traffic, very high to high vehicle volume,
high to very high pedestrian volume.
 V2 for roads connecting one region to other with mixed vehicle and pedestrian
traffic, high vehicle volume, high pedestrian volume.
 V3 for freeways, motorways with vehicle traffic only, very high to high vehicle
volume, high speeds. Also for roads that connect one region to other forming
avenues with mixed vehicle and pedestrian traffic, moderate to high vehicle
volume, high pedestrian volume.
 V4 & V5 for roads that connects main road to areas of development within the
region with mixed vehicle and pedestrian traffic, moderate vehicle volume, low
pedestrian volume.
 Light technical parameters for V lighting are
1. Upward Waste light Ratio

2. Average Carriageway Luminance
3. Overall Uniformity
4. Longitudinal Uniformity
5. Threshold Increment
6. Surround Verge Illuminance
7. Point Horizontal Illuminance
8. Illuminance Uniformity
 Lighting source should have highest Colour Rendering Index (CRI).

 Energy audit, to make sure that the life cycle of the lighting scheme is
minimized and is reliable and cost effective.
 Maintenance Factor to be assumed as 0.7 for LED and 0.8 for other lamps.
 Design spacing is the nominal spacing between luminaires, mounting height
and carriageway lighting design width. Usually this can deviate not more than
10% and the deviation should not occur for more than 2 consecutive spans.
 There are some design rules that will apply while you do the luminance base
computer calculations.
STRAIGHT SECTIONS OF THE ROAD

 Selection of carriageway lighting design width (Wk):This should not be less
than kerb-to-kerb width of carriageway for single carriageway kerbed roads,
kerb-to-kerb width of single carriageway for divided kerbed roads, kerb to
edge of the seal surface for roads with one kerb only, edge-to-edge length of
the sealed surface if there are no kerbs.
 Change from single carriageway to divided carriageways :
 Converging and Diverging traffic streams :

 One or more luminaires have to be installed at the crests or lumps.
CURVES
 There are three basic steps involved, determining the placement of a primary
row of luminaires, closing up the spacing according to cure spacing chart and
determining the need for supplementary luminaires from the roadway width.
 Placement of primary row of luminaires shall be on either the outside or inside
of the curve (decision should be made by the client ) and the luminaires are to
be located on the central median as it is advantageous to the driver.
 Closing up the primary row spacing based on the curve spacing chart by
using the equation
Sc = S x SR
Where,
Sc is the maximum spacing for curved section, measured along the arc of the
curve.
S is maximum spacing for the adjacent or equivalent straight section
SR is the spacing ratio
CATEGEORY ‘P’ LIGHTING

 There are different types of P type lighting. PR for roads in local area. PP for
pathways. PA for public activity areas (excluding car parks). PE for connecting
elements. PC for outdoor car parks (including roof-top car parks).
 The energy performance of a lighting scheme is a combined effects of
luminous efficacy and photometric distribution of luminaire, appropriateness of
lighting design for scheme layout and operation of lighting system in practice.

COMPUTER PROCEDURE FOR CALCULATION OF LIGHT

TECHNICAL PARAMETERS FOR CATEGORY ‘V’ & ‘P’

AS/NZS 1158.3.1 – CATEGORY P

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AS/NZS 1158 LIGHTING FOR ROADS AND PUBLIC

AS/NZS 1158.1.1 CATEGEORY ‘V’ LIGHTING

1. Upward Waste light Ratio

 Lighting source should have highest Colour Rendering Index (CRI).

STRAIGHT SECTIONS OF THE ROAD

 Converging and Diverging traffic streams :

CATEGEORY ‘P’ LIGHTING

COMPUTER PROCEDURE FOR CALCULATION OF LIGHT

AS/NZS 1158.3.1 – CATEGORY P

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