Roadway Lighting Shows Safety Benefits at Rural Intersections

Isebrands, Hillary N; Hallmark, Shauna; Wen, Li; McDonald, Tom; Storm, Richard; Preston, Howard

doi:10.1061/(asce)te.1943-5436.0000161

Cited by 21 publications

(10 citation statements)

References 3 publications

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“…Providing new lighting or improving existing lighting at intersections is one of the proven safety countermeasures of preventing crashes and reducing fatalities (Bullough, Donnell, & Rea, 2013;Isebrands et al, 2010). The improved visibility will reduce the glare of other light sources and enhance drivers' ability to obtain information quickly.…”

Section: Problem Statementmentioning

confidence: 99%

“…Hallmark et al (2008) investigated the before and after crashes at 274 intersections in Iowa and found that the intersection safety was improved with lighting in terms of night-to-day and night-to-total crash ratios. Isebrands et al (2010) analyzed 3-year before-period data and 3-year after-period data from 34 rural intersections in Minnesota. It was found through the study that with lighting the nighttime crash rate decreased 35%, the night-to-day crash ratio decreased 50%, and the night-to-total crash ration decreased 32%.…”

Section: Before-and-after Analysismentioning

confidence: 99%

See 1 more Smart Citation

Safety and Cost Performance of Intersection Lighting

Zhao¹,

Li²,

Jiang³

2017

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This activity provided a better understanding of maintenance issues, cycles, and costs. Surveys were sent to both State Highway Agencies (SHAs) and communities in order to identify perceptions from SHAs and the public about lighting improvement. The community survey included questions such as public attitudes toward intersection lighting, effectiveness of lighting, and visibility and safety improvement. To quantify the safety effects of lighting at intersections, crash modification factors (CMFs) were developed by using two methodologies: before-and-after analysis and cross-sectional statistical analysis. The developed CMFs could be used to justify roadway lighting projects. Life cycle cost analysis Joint transportation research program

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Section: Problem Statementmentioning

confidence: 99%

Section: Before-and-after Analysismentioning

confidence: 99%

Safety and Cost Performance of Intersection Lighting

Zhao¹,

Li²,

Jiang³

2017

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“…The effect of introducing or improving lighting on the number of road accidents has been extensively studied. The authors in [6,7] found a statistically significant dose-response relationship between average road luminance and road safety. Although there are differences in the literature regarding the percentage of reduction in the night/day crash ratio due to the presence of lighting, the common conclusion is that this is not a small number, even though it is not as high as the 30% reported in some studies conducted at the start of this century [8,9,10].…”

Section: Introductionmentioning

confidence: 99%

ITERL: A Wireless Adaptive System for Efficient Road Lighting

Gonzalez-Romo

Gómez-Galán

García-Martín

et al. 2019

Sensors

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This work presents the development and construction of an adaptive street lighting system that improves safety at intersections, which is the result of applying low-power Internet of Things (IoT) techniques to intelligent transportation systems. A set of wireless sensor nodes using the Institute of Electrical and Electronics Engineers (IEEE) 802.15.4 standard with additional internet protocol (IP) connectivity measures both ambient conditions and vehicle transit. These measurements are sent to a coordinator node that collects and passes them to a local controller, which then makes decisions leading to the streetlight being turned on and its illumination level controlled. Streetlights are autonomous, powered by photovoltaic energy, and wirelessly connected, achieving a high degree of energy efficiency. Relevant data are also sent to the highway conservation center, allowing it to maintain up-to-date information for the system, enabling preventive maintenance.

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“…Installing lighting at intersections has been used as a successful countermeasure against night crashes. For example, lighting an intersection has reduced night to day crash ratios and rates by 13–45%, respectively ( 2 – 6 ), and an increase in light levels has been associated with respective decreases in night to day crash ratios and rates of 7% ( 7 ) and 9% ( 8 ). Existing recommendations and guidelines for the design of intersection lighting have focused solely on lighting levels and stemmed from research relating lighting to night crashes at intersections.…”

mentioning

confidence: 99%

Effect of Intersection Lighting Design on Drivers’ Perceived Visibility and Glare

Bhagavathula

Gibbons

Nussbaum

2019

Transportation Research Record

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A systems-level approach to intersection lighting design has shown that illuminating the intersection box increases drivers’ nighttime visual performance. However, for an intersection lighting design to be effective and accepted, it should not only maximize visual performance but also enhance perceived visibility and minimize glare. The goals of this study were to assess the effects of different intersection lighting designs on these two outcomes. Visibility was assessed with respect to a pedestrian, several targets, and an intersection. Perceptions of visibility and glare were measured using Likert scales, with participants exposed to multiple lighting designs on a realistic intersection. Twenty-four participants completed the study, with an equal number of younger (18–35 years) and older (65+) drivers. The lighting design that illuminated the intersection box had the highest levels of perceived target and intersection visibility and the lowest ratings of glare. For the same lighting configuration, a strong positive correlation was also found between perceived target visibility and previous results on target detection distances. In this configuration, perceived visibility plateaued between 7 and 10 lux of mean intersection illuminance. Increased levels of perceived visibility in different conditions were likely a result of size and contrast differences, and the distribution of the luminaires used. These results suggest that illuminating the intersection box has multiple benefits, in that it not only increases visual performance but also increases perceived visibility and reduces glare.

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Roadway Lighting Shows Safety Benefits at Rural Intersections

Cited by 21 publications

References 3 publications

Safety and Cost Performance of Intersection Lighting

Safety and Cost Performance of Intersection Lighting

ITERL: A Wireless Adaptive System for Efficient Road Lighting

Effect of Intersection Lighting Design on Drivers’ Perceived Visibility and Glare

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