Page 31 - TT July Issue for Digital Edition

ROAD SAFETY

Secondary roads fall under adaptation of the human eye
Group B comprising those with to light. It can cause discomfort
considerable traffic, including and reduce road visibility.
principal local traffic routes Road lighting should not only
and shopping streets and those illuminate the road, but also the
with light traffic. Residential adjacent area so that motorists
and unclassified roads, bridges can see surrounding objects
and flyovers, town and city and anticipate possible road
centres and those with special obstacles (e.g. pedestrians
requirements near airfields, about to step onto the road).
railways and docks are also SR is the visibility of the road
classified into groups. perimeter relative to the main
road itself.
Designing Street The colour rendering index
Lighting measures the ability of artificial
light sources to display or
There are multiple factors to reproduce the colour of the
be considered while designing road or objects on the road
street lighting as recommended relative to natural light sources.
by the international Commission The natural light source (Sun)
on Illumination (CIE). Some has a CRI of 100. The higher the
of them include average index, the better the visibility.
road luminance, brightness Through the guidance auxiliary BEST with over 34,500 poles
uniformity, longitudinal facilities of the road, such as
uniformity, glare, environmental the centreline of the road, the and 44,300 energy-efficient
ratio SR, Colour Rendering Index curb, the road sign, the driver LED lamps has always been
(CRI) and visual inducement. committed to illuminating
can know his position and the
Road Luminance is a measure direction in front of the road. Mumbai, ensuring the safety
of the visibility of the road. It This is visual inducement. and comfort of its citizens,
is the most important factor, Four fundamental types drivers, and pedestrians
affecting whether the obstacle of siting arrangements are alike embracing eco-friendly
can be seen and is based on the recognized in street lighting. practices. Our centralized
principle of illuminating the road Single side arrangement,
enough to see the outline of the where all the luminaires are automatic streetlight
obstacle. Brightness depends on one side of the road. This monitoring system (ASMS)
on the light distribution of the is recommended only when exemplifies our innovation,
luminaire, the lumen output of the width of the road is equal providing real-time data to
the luminaire, the installation to or less than the mounting enhance operational efficiency
design of the street lighting, height. Staggered arrangement,
and the reflective properties of where the luminaires are placed and curb electricity theft.
the road surface. The higher the on either side of the road in We take pride in our role in
brightness level, the better the a zigzag formation. This is making Mumbai a city that
lighting effect. truly never sleeps.
recommended when the road
Uniformity is an index to width is 1 to 1.5 times that of
measure the uniformity of the mounting height. Opposite Anil Diggikar (IAS),
light distribution on the road, mounting, where the luminaires General Manager, BEST Undertaking
which can be expressed as are situated on either side of the
overall uniformity (U0) and road opposite to one another.
longitudinal uniformity (UI). This is advisable for road widths
Glare is the blinding sensation more than 1.5 times that of
that occurs when the brightness the mounting height, and axial
of light exceeds the level of mounting, where the luminaires

www.trafficinfratech.com / July 2024 / TRAFFICINFRATECH 31