Evaluating the impact of road lighting on pedestrian reassurance through the day-dark approach

Wei, Lanlan (author), Bizjak, Grega (author), Kobav, Matej Bernard (author)

A field study in the urban area of Ljubljana, Slovenia, explored the impact of variations in lighting parameters on pedestrian perceptions of safety, visual comfort and risk. Utilising the day-dark approach with 35 participants, this research evaluates differences in perception under daytime and after dark (but with road lighting) environments to determine the optimal lighting conditions. The results suggested that a minimum horizontal illuminance of 1.8 lx, corresponding to a day-dark differential of 0.5 on a 5-point scale, and a minimum luminance of about 0.15 cd ▫$m^-2$▫ were optimal for perceived safety and comfort. The results suggest that minimum illuminance provided a more effective predictor of pedestrian reassurance than did the other lighting parameters considered.

• Language: English
• Keywords: lighting, illuminance, luminance, street lighting, day-dark approach
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FE - Faculty of Electrical Engineering
• Publication status: Published
• Publication version: Version of Record
• Year: 2025
• Number of pages: Str. 264-277
• Numbering: Vol. 57, iss. 3
• PID: 20.500.12556/RUL-169293
• UDC: 628.9
• ISSN on article: 1477-0938
• DOI: 10.1177/14771535241269699
• COBISS.SI-ID: 212798979
• Publication date in RUL: 22.05.2025

Record is a part of a journal

• Title: Lighting research & technology
• Shortened title: Light. res. technol.
• Publisher: Arnold
• ISSN: 1477-0938
• COBISS.SI-ID: 518303769

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.

Secondary language

• Language: Slovenian
• Keywords: razsvetljava, osvetljenost, svetlost, cestna razsvetljava, metoda dan-noč

Projects

• Funder: ARIS - Slovenian Research and Innovation Agency
• Project number: P2-0356
• Name: Elektroenergetski sistemi