Influence of Pavement Heterogeneity and Observation Angle on Lighting Design: Study with New Metrics

Florian Greffier, Valérie Muzet, Vincent Boucher, Fabrice Fournela, Laure Lebouc and Sébastien Liandrat
Additional contact information
Florian Greffier: Cerema, Light and Lighting Team, 49130 Les Ponts-de-Cé, France
Valérie Muzet: Cerema, ENDSUM Research Team, 67200 Strasbourg, France
Vincent Boucher: Cerema, Light and Lighting Team, 49130 Les Ponts-de-Cé, France
Fabrice Fournela: Cerema, Light and Lighting Team, 49130 Les Ponts-de-Cé, France
Laure Lebouc: Cerema, Light and Lighting Team, 49130 Les Ponts-de-Cé, France
Sébastien Liandrat: Cerema, STI Research Team, 63000 Clermont-Ferrand, France

Sustainability, 2021, vol. 13, issue 21, 1-31

Abstract: Optimization of lighting installations should be a priority in order to reduce energy consumption and obtrusive light while providing optimal visibility conditions for road users. For the design of lighting installations, it is assumed that the road has homogeneous photometric characteristics and only one viewing angle is used. There are often significant differences between the design of lighting installations and their actual performance. In order to examine whether these differences are due to the photometry of the road, this study proposes metrics to assess the influence of road heterogeneity and observation angle. These metrics have been used on many measurements conducted on site and in the laboratory for different pavements. A calculation engine has been developed to realize road lighting design with several r-tables in the same calculation or for different observation angles. Thus, this study shows that a root mean squared deviation (RMSD) calculation, including average luminance and uniformities associated with different r-tables, is directly correlated to a normalized root mean squared deviation (NRMSD) calculation between these r-tables. With these proposed metrics it is possible to optimize lighting installation while taking into account different types of urban surfaces and the diversity of users.

Keywords: road lighting calculations; pavement reflection properties; gonioreflectometer devices; luminance measurements; root mean squared deviation; normalized root mean squared deviation (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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