Analysis of Luminance Contrast Values at Illuminated Pedestrian Crossings in Urban Conditions

Piotr Tomczuk (), Anna Wytrykowska and Marcin Chrzanowicz
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Piotr Tomczuk: Faculty of Transport, Warsaw University of Technology, 00-662 Warsaw, Poland
Anna Wytrykowska: Faculty of Engineering, Helena Chodkowska University of Technology and Economics, 03-301 Warsaw, Poland
Marcin Chrzanowicz: Faculty of Electrical Engineering, Warsaw University of Technology, 00-662 Warsaw, Poland

Energies, 2023, vol. 16, issue 24, 1-27

Abstract: Lighting pedestrian crossings play an important role in ensuring the safety of pedestrians on the road, especially at night or in conditions of reduced visibility. Currently functioning normative and formal requirements, which are the basis for the design of lighting for pedestrian crossings, are described by criteria of lighting intensity. Each of the existing solutions operates in an urban environment, and at the stage of design and operation, the obtained values of the produced luminance contrast of the pedestrian silhouette and its background are not known. The main purpose of the article is to compare, based on luminance parameters, the three lighting solutions used at pedestrian crossings. This article presents and describes the method of determining the luminance contrast based on luminance measurements of the pedestrian silhouette and its background. Detailed results of measurements of luminance parameters at selected pedestrian crossings are presented. An analysis of the results was made with a breakdown of typical lighting solutions used in urban conditions. The differences between standard lighting were discussed, as well as supplementary and dedicated lighting. The obtained ranges of luminance contrast levels occurring in urban conditions for individual solutions were determined. The energy indicator for each solution was determined.

Keywords: luminance; contrast; measurement; pedestrian crossings; street lighting (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
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