Modeling effects of roadway lighting photometric criteria on nighttime pedestrian crashes on roadway segments

Li, Qianwen; Wang, Zhenyu; Kolla, Rama Durga Tammayya Naidu; Li, Mingchen; Yang, Runan; Lin, Pei-Sung; Li, Xiaopeng

doi:10.1016/j.jsr.2023.07.004

Cited by 4 publications

(2 citation statements)

References 27 publications

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“…Thus, photometric parameters that describe the light performance of luminaire, such as the light intensity distribution, light intensity at angle, light output ratio and total luminous flux, are important to design the required illumination level for a given space, whether for indoor or outdoor lighting designs (Abdullah et al, 2021). For road lighting or public lighting, sufficient illumination is required to reduce traffic accidents (Li et al, 2023;Setyaningsih & Candra, 2023). Two roadway photometric criteria (horizontal illuminance and lighting uniformity) were investigated, and the matched case-control method was applied to decouple the illuminance average and standard deviation (Li et al, 2023).…”

Section: Introductionmentioning

confidence: 99%

“…For road lighting or public lighting, sufficient illumination is required to reduce traffic accidents (Li et al, 2023;Setyaningsih & Candra, 2023). Two roadway photometric criteria (horizontal illuminance and lighting uniformity) were investigated, and the matched case-control method was applied to decouple the illuminance average and standard deviation (Li et al, 2023). DIAlux software simulation was used to find the most optimum photometric illuminance in road lighting freeways in Indonesia to comply with the standard SNI 7391:2008 and eventually reduce accidents at night (Setyaningsih & Candra, 2023).…”

Section: Introductionmentioning

confidence: 99%

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Study of LED Retrofit Lamps in HSPV Luminaires Based on Photometric Method for Road Lighting

Jamaludin,

Wan Ismail,

Mohd Husini

et al. 2024

JST

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Energy reduction is a great challenge in road lighting applications. Replacing high-pressure sodium vapor (HPSV) with light-emitting diodes (LED) is a viable approach to reducing energy consumption. However, a total replacement can incur a significant capital cost. This study aims to investigate the effects on light distribution by replacing HPSV lamps with LED lamps in HPSV luminaires using Light Intensity Distribution (LID) curve measurement and Backlight, Uplight and Glare (BUG) rating evaluation to reduce the adoption costs. While LED lamps have high illumination rates, the structural differences from HPSV lamps can affect the LID curve and original lighting design. Therefore, it is crucial to study photometric dispersion after retrofitting light sources. Both lamps were installed into similar HPSV luminaires to assess photometric performance using goniophotometer measurements. The HPSV lamp outperforms the LED lamp in terms of luminous flux (11.13%) and light intensity (7.69%), whereas the LED lamp outperforms the HPSV lamp in terms of efficacy rating (68.67%) and wattage used (47.61%). The findings indicate that retrofit LED luminaires have an LOR of 46.77% lower than the HPSV luminaires. The light distribution pattern is maintained but reduced to 40 to 50% for the main usable light angles. The reduced performance is caused by the lamp structure, which occupies a large area inside the luminaire housing, obstructing proper light distribution. Although overall energy consumption is reduced, similar illumination levels cannot be maintained. These outcomes can assist authorities and manufacturers with alternative methods of reducing costs while maintaining lighting levels.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Study of LED Retrofit Lamps in HSPV Luminaires Based on Photometric Method for Road Lighting

Jamaludin,

Wan Ismail,

Mohd Husini

et al. 2024

JST

View full text Add to dashboard Cite

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Factors influencing pedestrian injury severity in Chile: A hierarchical probit ordered model approach

Gutiérrez,

Ramos,

Soto

et al. 2025

Journal of Safety Research

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Identifying potential tailgaters using matched case-control logistic regression

Sahnoon,

de Barros,

Kattan

2024

Can. J. Civ. Eng.

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Road collisions arise from interactions involving human factors, the environment, and road layout. Driving simulators, widely applied in rear-end collision studies, provide a secure environment to explore human errors, which are not observable through microsimulation tools. These simulators also facilitate the examination of driving behaviour in the presence of connected vehicles. This study aims to identify driver-related factors contributing to rear-end collisions in a driving simulator and to detect potential tailgaters behind a connected vehicle with connected cruise control. Using case-control logistic regression, participants with the potential to be involved in rear-end collisions are considered potential tailgaters, while non-potential participants serve as controls. The results reveal statistically significant factors, such as headway time and maximum brake mean values, in relation to rear-end collisions. Furthermore, employing regression outputs, log relative risk and survival function, with predefined thresholds effectively identifies potential tailgaters, achieving accuracy rates of over 90% and 97%, respectively.

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Modeling effects of roadway lighting photometric criteria on nighttime pedestrian crashes on roadway segments

Cited by 4 publications

References 27 publications

Study of LED Retrofit Lamps in HSPV Luminaires Based on Photometric Method for Road Lighting

Study of LED Retrofit Lamps in HSPV Luminaires Based on Photometric Method for Road Lighting

Factors influencing pedestrian injury severity in Chile: A hierarchical probit ordered model approach

Identifying potential tailgaters using matched case-control logistic regression

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