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Author Marchant, P.R. url  openurl
  Title What is the contribution of street lighting to keeping us safe? An investigation into a policy. Type Journal Article
  Year 2010 Publication Radical Statistics Abbreviated Journal  
  Volume Issue 102 Pages 32-42  
  Keywords Public Safety  
  Abstract Lighting of roads is said to be of benefit beyond giving the ability to be

able to see in the dark. It is claimed for example that lighting reduces

crime and traffic accidents by a considerable amount and it is

therefore necessary to have it for these reasons. My view remains that

this claim lacks evidence of a sufficiently high standard to warrant

using public safety as an argument. On the other hand there are

reasons why having a lot of light at night might be a bad thing. This

work continues a previous talk and article for Radical Statistics

(Marchant 2006)

My initial interest in this area was sparked through my interest in

astronomy because light pollution makes it hard to appreciate the

wonders of the night sky. It seemed to me that the belief that lighting

reduces crime was questionable…. I then embarked on investigating

the crime reduction claim and found it suspect, as detailed in the

2006 Radical Statistics article. (See also Marchant 2004, 2005, 2007,

2009)
 
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  Call Number LoNNe @ christopher.kyba @ Serial (down) 450  
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Author Marchant, P.R. url  openurl
  Title Have new street lighting schemes reduced crime in London? Type Journal Article
  Year 2011 Publication Radical Statistics Abbreviated Journal  
  Volume Issue 104 Pages 39-48  
  Keywords Public Safety  
  Abstract Crime counts published by the Home Office for the Metropolitan Police

Crime and Disorder Reduction Partnership areas have been collated

across the years 2003-2009. The crime counts over time have been

modelled taking into account the ‘multilevel’ (years within areas)

nature of the data. The key variable of interest, as a predictor of

within-area change of crime, is the proportion of a Core Investment

Period of new Private Finance Initiative street lighting which had been

completed up to the given time point as a predictor of within area

change of crime. The final model gave a 95% confidence interval for

the multiplier by which the number of crimes is increased of (0.87,

1.11), for a fully implemented lighting programme, consistent with

zero effect.
 
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  Notes Approved no  
  Call Number LoNNe @ christopher.kyba @ Serial (down) 449  
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Author Lin, Y.; Liu, Y.; Sun, Y.; Zhu, X.; Lai, J.; Heynderickx, I. url  doi
openurl 
  Title Model predicting discomfort glare caused by LED road lights Type Journal Article
  Year 2014 Publication Optics Express Abbreviated Journal Opt. Express  
  Volume 22 Issue 15 Pages 18056  
  Keywords LED; LED lighting; glare; road safety; traffic  
  Abstract To model discomfort glare from LED road lighting, the effect of four key variables on perceived glare was explored. These variables were: the average glare source luminance (Lg), the background luminance (Lb), the solid angle of the glare source from the perspective of the viewer; and the angle between the glare source and the line of sight. Based on these four variables 72 different light conditions were simulated in a scaled experimental set-up. Participants were requested to judge the perceived discomfort glare of these light conditions using the deBoer rating scale. All four variables and some of their interactions had indeed a significant effect on the deBoer rating. Based on these findings, we developed a model, and tested its general applicability in various verification experiments, including laboratory conditions as well as real road conditions. This verification proved the validity of the model with a correlation between measured and predicted values as high as 0.87 and a residual deviation of about 1 unit on the deBoer rating scale. These results filled the gap in estimating discomfort glare of LED road lighting and clarified similarities of and differences in discomfort glare between LED and traditional light sources.  
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  Series Volume Series Issue Edition  
  ISSN 1094-4087 ISBN Medium  
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  Notes Approved no  
  Call Number IDA @ john @ Serial (down) 351  
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Author Kostic, A.; Djokic, L. url  doi
openurl 
  Title Subjective impressions under LED and metal halide lighting Type Journal Article
  Year 2014 Publication Lighting Research and Technology Abbreviated Journal Lighting Research and Technology  
  Volume 46 Issue 3 Pages 293-307  
  Keywords lighting; outdoor lighting; subjective; LED; metal halide; *Safety; Belgrade  
  Abstract In order to compare subjective impressions created by LED and metal halide ambient lighting, a pilot project was conducted in a Belgrade park. All general requirements for an adequate comparison of subjective impressions were fulfilled. The survey was conducted using a questionnaire related to all aspects the researchers considered relevant for subjective evaluation of illuminated pedestrian paths in parks. It was concluded that the respondents, both those who had and those who did not have previous knowledge in the field of lighting, strongly preferred the use of metal halide lamps for the illumination of parks, which is in opposition to the statements of some LED manufacturers. It was also shown that light level and feelings of safety and comfort are evaluated as most important.  
  Address Faculty of Architecture, University of Belgrade, Belgrade, Serbia  
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  Series Volume Series Issue Edition  
  ISSN 1477-1535 ISBN Medium  
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  Notes Approved no  
  Call Number IDA @ john @ Serial (down) 336  
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Author Fotios, S.; Yang, B.; Uttley, J. url  openurl
  Title Observing other pedestrians: Investigating the typical distance and duration of fixation Type Journal Article
  Year 2014 Publication Lighting Research and Technology Abbreviated Journal Lighting Research and Technologying Res & Tech  
  Volume 47 Issue 5 Pages 548-564  
  Keywords traffic safety; pedestrians; roadway lighting; visibility; light at night  
  Abstract After dark, road lighting should enhance the visual component of pedestrians’ interpersonal judgements such as evaluating the intent of others. Investigation of lighting effects requires better understanding of the nature of this task as expressed by the typical distance at which the judgement is made (and hence visual size) and the duration of observation, which in past studies have been arbitrary. Better understanding will help with interpretation of the significance of lighting characteristics such as illuminance and light spectrum. Conclusions of comfort distance in past studies are not consistent and hence this article presents new data determined using eye-tracking. We propose that further work on interpersonal judgements should examine the effects of lighting at a distance of 15 m with an observation duration of 500 ms.  
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  Notes Approved no  
  Call Number IDA @ john @ Serial (down) 309  
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