Uniformity Predicts Pedestrian Reassurance Better Than Average Illuminance

Fotios, Steve; Liachenko-Monteiro, Aleks

doi:10.25039/x46.2019.po180

Cited by 6 publications

(2 citation statements)

References 18 publications

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“…A technical report summarizing the current status of empirical evidence concerning pedestrian lighting concludes that high uniformity is beneficial for reassurance and that the proposed optimal criteria for minimum horizontal illuminance should be used for both reassurance and obstacle detection, but not for evaluating other pedestrians [17]. In residential streets, reassurance increases with higher uniformity [18,19]. More uniform lighting increases perceived safety in virtual public squares [20].…”

Section: Introductionmentioning

confidence: 99%

Simulations and Analysis of the Optimum Uniformity for Pedestrian Road Lighting Focusing on Energy Performance and Spill Light in the Roadside Environment

Bouroussis

Jägerbrand

2022

Energies

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Road lighting uniformity is an essential lighting quality parameter for motorists and pedestrians and varies with lighting design parameters. Increased road lighting uniformity may result in benefits, such as increased reassurance and perceived safety for pedestrians or an increased overall visual perception. However, no previous study has investigated how road lighting uniformity varies with lighting design scenarios or how the uniformity of various lighting design scenarios affects other essential parameters, such as energy performance and obtrusive light. This study aimed to investigate: (I) how uniformity varies with different road lighting design scenarios, and (II) how uniformity correlates with energy performance and risk for increasing spill light. The study is limited to pedestrian roads. We performed photometric calculations in ReluxDesktop for more than 1.5 million cases with single-sided pole arrangements and for various geometries of road width, pole distance, pole height, overhang, and luminaire tilt. The results were analyzed with a set of five relevant metrics that were calculated and analyzed together with uniformity. For the evaluation, we used the minimum luminaire power needed to achieve an average illuminance of 10 lx, the power density indicator (DP), edge illuminance ratio (REI), and we introduced two new indicators for spill light on the ground in the border areas: the extended edge illuminance ratio (extended REI) and the spill flux ratio (RSF). The results show that increased uniformity levels may significantly increase energy consumption and spill light, but that both these impacts can be relatively controlled if uniformity is kept under certain limits. The investigated cases also demonstrated that improper lighting planning significantly increases adverse effects, such as spill light.

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Section: Introductionmentioning

confidence: 99%

Simulations and Analysis of the Optimum Uniformity for Pedestrian Road Lighting Focusing on Energy Performance and Spill Light in the Roadside Environment

Bouroussis

Jägerbrand

2022

Energies

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“…According to Fotios, the current recommendation, CIE 136-2000, may even be outdated (CIE, 2019). Fotios et al propose that it is more important to examine the spatial distribution of light as a whole than the quantity of light on horizontal surfaces (CIE, 2019, Fotios andLiachenko-Monteiro, 2019). It is problematic to focus too much on illuminance because peoples' opinions can be biased, and people generally tend to prefer the highest brightness levels, regardless of the illuminance levels tested (CIE, 2019).…”

Section: Introductionmentioning

confidence: 99%

Impact of Qualitative and Quantitative Methods on the Evaluation of Street Lighting Uniformity

Lindh¹,

Jägerbrand²

2021

Proceedings of the Conference CIE 2021

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Uniformity of lighting for pedestrians is often assumed to have been achieved in mixed traffic environments when the lighting uniformity requirements for vehicular traffic have been fulfilled. Uniformity of lighting for drivers is commonly evaluated based on quan-titative data on parameters such as overall luminance uniformity. However, methods for evaluating uniformity from the perspective of other road users are currently somewhat lacking. This study discusses qualitative and quantitative methods of assessing street lighting uniformity, and the potential implications for lighting design and the road us-ers. We used convergence design and imbedded design based on two field studies. The research purpose is twofold: first, to study if, and how, measured lighting uni-formity corresponds with visual perception. Secondly, to identify and explain the addi-tional value that a combined method approach can contribute. The study considers ex-amples of when the measured uniformity corresponds to visually perceived uniformity and when they do not correspond.

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Park lighting after dark – is it a route or a place? How people feel in park nightscapes (experiment)

Lis,

Zienowicz,

Kącki

et al. 2024

Landscape and Urban Planning

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Uniformity Predicts Pedestrian Reassurance Better Than Average Illuminance

Cited by 6 publications

References 18 publications

Simulations and Analysis of the Optimum Uniformity for Pedestrian Road Lighting Focusing on Energy Performance and Spill Light in the Roadside Environment

Simulations and Analysis of the Optimum Uniformity for Pedestrian Road Lighting Focusing on Energy Performance and Spill Light in the Roadside Environment

Impact of Qualitative and Quantitative Methods on the Evaluation of Street Lighting Uniformity

Park lighting after dark – is it a route or a place? How people feel in park nightscapes (experiment)

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