Standards and Recommendations - Road Lighting: Fundamentals, Technology and Application - page 98

Table 9.2 Example of
parameters determining
the M lighting class with
their weighting value.
(CIE 2010 )

Parameter Options Weighting

value V w

Speed High 0.5

Moderate 0

Traffic volume High 0.5

−

Very low 1

Traffic composition Mixed with high %

of non-motorized

2

Mixed 1

Motorized only 0

Separation of carriageways No 1

Ye s 0

Intersection density High 1

Moderate 0

Parked vehicles Present 0.5

Not present 0

Ambient luminance High 1

Low − 1

Visual guidance/traffic control Poor 0.5

Moderate or good 0

9.1.2 Lighting of Conflict Areas

The same CIE recommendation also specifies lighting for so-called conflict areas
that may occur on traffic routes where different vehicle streams intersect, where
there is a change in road geometry (e.g. reduced number of lanes), or where the
same road network is used by a mixture of motorized traffic and other types of
traffic (pedestrians, cyclists, etc.). Again, weighting values, now specific for conflict
areas, are given to determine the lighting class of the conflict area (C0 to C5).
The corresponding lighting required for each conflict lighting class, C, is specified
in terms of the familiar lighting criteria for level, uniformity, glare restriction and
surround lighting.
For pedestrian crossings, the CIE Guide to the Lighting of Urban Areas
(CIE, 2000 ), specifies the horizontal illuminance values of Table 9.3 .

9.1.3 Lighting for Pedestrians and Low-Speed Traffic

The method of specifying lighting for these categories of road users is the same as
that for the motorized traffic category dealt with in the previous Section. However,