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Bullough, J.D.; Donnell, E.T.; Rea, M.S. |
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Title |
To illuminate or not to illuminate: roadway lighting as it affects traffic safety at intersections |
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Year |
2013 |
Publication |
Accident; Analysis and Prevention |
Abbreviated Journal |
Accid Anal Prev |
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53 |
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65-77 |
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Keywords |
Lighting; Accident Prevention/*methods; Accidents, Traffic/*prevention & control/psychology/statistics & numerical data; Cross-Sectional Studies; *Environment Design; Humans; *Lighting; Minnesota; Models, Statistical; Photoperiod; Psychomotor Performance; Regression Analysis; Safety/statistics & numerical data; Visual Perception |
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Abstract |
A two-pronged effort to quantify the impact of lighting on traffic safety is presented. In the statistical approach, the effects of lighting on crash frequency for different intersection types in Minnesota were assessed using count regression models. The models included many geometric and traffic control variables to estimate the association between lighting and nighttime and daytime crashes and the resulting night-to-day crash ratios. Overall, the presence of roadway intersection lighting was found to be associated with an approximately 12% lower night-to-day crash ratio than unlighted intersections. In the parallel analytical approach, visual performance analyses based on roadway intersection lighting practices in Minnesota were made for the same intersection types investigated in the statistical approach. The results of both approaches were convergent, suggesting that visual performance improvements from roadway lighting could serve as input for predicting improvements in crash frequency. A provisional transfer function allows transportation engineers to evaluate alternative lighting systems in the design phase so selections based on expected benefits and costs can be made. |
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Lighting Research Center, Rensselaer Polytechnic Institute, 21 Union Street, Troy, NY 12180, USA |
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0001-4575 |
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PMID:23377085 |
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LoNNe @ kagoburian @ |
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627 |
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Cinzano, P. |
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Title |
A portable spectrophotometer for light pollution measurements. |
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2004 |
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Mem. SA It. Suppl. |
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5 |
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395–398 |
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Lighting |
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628 |
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Commission International de L’Eclairage. |
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Title |
ROAD TRANSPORT LIGHTING FOR DEVELOPING COUNTRIES. |
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2007 |
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CIE |
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180 |
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Commission International de L’Eclairage.. |
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Colorimetry |
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2004 |
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CIE |
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552 |
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LoNNe @ kagoburian @ |
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630 |
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Elejoste, P.; Angulo, I.; Perallos, A.; Chertudi, A.; Zuazola, I.J.G.; Moreno, A.; Azpilicueta, L.; Astrain, J.J.; Falcone, F.; Villadangos, J. |
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Title |
An easy to deploy street light control system based on wireless communication and LED technology |
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Journal Article |
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Year |
2013 |
Publication |
Sensors (Basel, Switzerland) |
Abbreviated Journal |
Sensors (Basel) |
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13 |
Issue |
5 |
Pages |
6492-6523 |
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Lighting |
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This paper presents an intelligent streetlight management system based on LED lamps, designed to facilitate its deployment in existing facilities. The proposed approach, which is based on wireless communication technologies, will minimize the cost of investment of traditional wired systems, which always need civil engineering for burying of cable underground and consequently are more expensive than if the connection of the different nodes is made over the air. The deployed solution will be aware of their surrounding's environmental conditions, a fact that will be approached for the system intelligence in order to learn, and later, apply dynamic rules. The knowledge of real time illumination needs, in terms of instant use of the street in which it is installed, will also feed our system, with the objective of providing tangible solutions to reduce energy consumption according to the contextual needs, an exact calculation of energy consumption and reliable mechanisms for preventive maintenance of facilities. |
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Deusto Institute of Technology (DeustoTech), University of Deusto, Bilbao 48007, Spain. perallos@deusto.es |
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1424-8220 |
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PMID:23681092; PMCID:PMC3690067 |
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LoNNe @ kagoburian @ |
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631 |
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