SR
Two-way traffic
One-way traffic
ROAD OPTICS
OPTICS FOR PEDESTRIAN CROSSINGS
For road optics, PERFORMANCE iN LIGHTING identifies the optics that have a
very broad beam spread on the β plane (usually greater than 120°), with the
point of maximum emission on one of the adjacent planes to the latter, up to
a maximum of 45°.
Road lighting based on L/H ratio that can be found in road lighting systems,
where:
- L: distance between the optical axes of the luminaire and the part of the
area furthest from it with its own requirements.
- H: height of installation of the luminaire.
EXAMPLE
Acronym of the road optics based on the L/H ratio: R/xxx
where:
R = road
xxx = L/H value (e.g. 100 = 1.00)
For example: R/075, R/100
For optics for pedestrian crossings PERFORMANCE iN LIGHTING identifies
those optics for lighting in the direction of their flow.
They feature asymmetrical emission both on the α plane and on the β plane.
EXAMPLE
Acronym of optics for pedestrian crossings: Z/R
where:
Z = zebra (pedestrian crossing)
R = right (for countries where driving is on the right)
Name of the road optics based on the L/H ratio:
Type of optic
Acronyms
Description
075
Optic for L/H up to 0.75 (0,5 ≤ L/H ≤ 0,875)
100
Optic for L/H of 1 (0,875 ≤ L/H ≤ 1,125)
125
Optic for L/H of 1.25 (1,125 ≤ L/H ≤ 1,375)
150
Optic for L/H of 1.5 (1,375 ≤ L/H ≤ 1,625)
XXXIII
H
L
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