Increase pedestrian safety by critical crossroads: lighting measurements and analysis

Armas, J. Hernandez; Laugis, Juhan

doi:10.1109/epe.2007.4417340

Cited by 5 publications

(5 citation statements)

References 1 publication

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“…Thus, proper CE class selection is essential. Post-installation measurements should be mandatory, especially if Charge-Coupled Devices (CCD) or cameras (Armas et al, 2007), like LMK Mobile Air, are available on the market. Such preliminary or approximate validation (Kuusik et al, 2016) can save much time and allow for the analysis of many parameters.…”

Section: Modelling In Dialux Type Softwarementioning

confidence: 99%

Smart City Street Lighting System Quality and Control Issues To Increase Energy Efficiency and Safety

Avotiņš

Adrian

Porins

et al. 2021

BJRBE

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According to standards, the lighting system is one of the key elements to provide safety on city roads, defined by quality parameters. LED technology and movement detection sensor interaction bring about new regulation techniques, creating an energy-efficient smart LED lighting system concept. This paper reveals extensive comparative data analysis of Dialux simulation results before the project implementation phase and in-situ quality parameter measurements for various street profiles and LED luminary power types. After the project implementation phase, more than 1000 measurement points are reached. Further, energy efficiency increase issues in smart lighting systems are described in terms of LED luminary dimming profile analysis and future dynamic control application modes. The first findings clearly show that in most cases light output in simulation results is lower than in real situations; therefore, LED luminary power can be decreased, allowing for higher energy savings in first luminary maintenance years, keeping the same defined ME class or safety level. Let us suppose that the traffic intensity data are obtained from smart system sensors. In that case, the ME class can be dynamically selected during different night times, thus increasing safety and providing extra energy savings using the same system elements, as well as leading to better ROI values.

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Section: Modelling In Dialux Type Softwarementioning

confidence: 99%

Smart City Street Lighting System Quality and Control Issues To Increase Energy Efficiency and Safety

Avotiņš

Adrian

Porins

et al. 2021

BJRBE

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“…The high number of accidents at nighttime, despite the lower traffic volumes than during the daytime, led several researchers to conduct studies that investigated the causes of this situation, given the importance of nighttime road safety (19,20). Road lighting is a countermeasure in response to the lack of clear visibility, and it is believed to help road users obtain enough visual information to move more safely at nighttime (21).…”

Section: Earlier Studiesmentioning

confidence: 99%

“…Only a few studies conducted field measurements of lighting con ditions on the road (19,22,28,(31)(32)(33). Of the different measures available, the easiest and most common way was to measure actual road illuminance (22,31).…”

Section: Earlier Studiesmentioning

confidence: 99%

Road Lighting Effects on Bicycle and Pedestrian Accident Frequency: Case Study in Montreal, Quebec, Canada

Niaki

Saunier

et al. 2016

Transportation Research Record: Journal of the Transportation R

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Although vehicle, bicycle, and pedestrian flows are considerably lower in general during the nighttime, a higher number of accidents than expected occur during this time. A highly influential factor is the lack of visibility at nighttime. Several studies have shown the negative effects of the lack of visibility on bicycle and pedestrian accident frequency and injury severity at nighttime. However, these studies considered only the presence or absence of light, which was not sufficient to evaluate road user safety. Only a limited number of studies in this field actually measured nighttime road illuminance levels. This study relied on the collection of road illuminance data on road links during the nighttime in downtown Montreal, Quebec, Canada, through the use of an illuminance sensor mounted on a scooter. Pedestrian and bicycle accident frequencies were analyzed separately with the use of the negative binomial model. Unexpectedly, the result showed that an increase in road lighting was associated with more bicycle and pedestrian accidents, which might have been explained by the decision to add or increase the amount of lighting at locations in which accidents occurred. The presence of a bike facility and arterial roads was associated with a decrease in bicycle accident occurrence. For pedestrians, the number of lanes per link and the pedestrian flow were associated with an increase in nighttime accident frequency, while the vehicle flow was associated with a decreasing number of accidents. The study called for more investigation of the precise relationship between safety and the amount of light provided by road lighting.

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“…However, the pixel resolution of this CCD ProMetric 1400 photometer is only 500 × 500, which was not enough to measure large scenes. Armas and Laugis used an LMK camera developed by the TechnoTeam Company for measuring roadway luminance [21,22]. The LMK camera could record both the image and luminance values of the scene with a pixel resolution of 5184 × 3456 for image acquisition and 2592 × 1728 for luminance mapping [23].…”

Section: Roadway Light Measurementmentioning

confidence: 99%

“…Ylinen et al also used the LMK Mobile Advanced luminance measuring camera for evaluation of LED street lighting [24]. In spite of their potentials for wide uses in roadway environments, all these measurement techniques proposed by Ekrias et al [2,3], Aktan et al [20], Armas and Laugis [21,22], and Ylinen et al [24] required high-cost equipment.…”

Section: Roadway Light Measurementmentioning

confidence: 99%

Measuring Light and Geometry Data of Roadway Environments with a Camera

Cai

Li²

2014

JTTs

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Evaluation of the conspicuity of roadway environments for their environmental impact on driving performance is vital for roadway safety. Existing meters and tools for roadway measurements cannot record light and geometry data simultaneously in a high resolution. This study introduced a new method that adopted recently developed high dynamic range (HDR) photogrammetry to measure the luminance and XYZ coordinates of millions of points across a road scene with the same device-a camera, and a MatLab code for data treatment and visualization. To validate this method, the roadway environments of a straight and flat section of Jayhawk Boulevard (482.8 m long) at Lawrence, KS and a roundabout (15.3 m in diameter) at its end were measured under clear and cloudy sky in the daytime and at nighttime with dry and wet pavements. Eight HDR images of the roadway environments under different viewing conditions were generated using the HDR photogrammetric techniques and calibrated. From each HDR image, synchronous light and geometry data were extracted in Radiance and further analyzed to identify potential roadway environmental hazards using the MatLab code (http://people.ku.edu/~h717c996/research.html). The HDR photogrammetric measurement with current equipment had a margin of errors for geometry measurement that varied with the measuring distance, averagely 23.1%-27.5% for the Jayhawk Boulevard and 9.3%-16.2% for the roundabout. The accuracy of luminance measurement was proven in the literature as averagely 1.5%-10.1%. The camera-aided measurement is fast, non-contact, non-destructive, and off the road, thus, it is deemed more efficient and safer than conventional ways using meters and tools. The HDR photogrammetric techniques with current equipment still need improvements on accuracy and speed of the data treatment.

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Increase pedestrian safety by critical crossroads: lighting measurements and analysis

Cited by 5 publications

References 1 publication

Smart City Street Lighting System Quality and Control Issues To Increase Energy Efficiency and Safety

Smart City Street Lighting System Quality and Control Issues To Increase Energy Efficiency and Safety

Road Lighting Effects on Bicycle and Pedestrian Accident Frequency: Case Study in Montreal, Quebec, Canada

Measuring Light and Geometry Data of Roadway Environments with a Camera

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