| Records |
| Author |
Kersavage, K.; Skinner, N.P.; Bullough, J.D.; Garvey, P.M.; Donnell, E.T.; Rea, M.S. |
| Title |
Investigation of flashing and intensity characteristics for vehicle-mounted warning beacons |
Type |
Journal Article |
| Year |
2018 |
Publication |
Accident Analysis & Prevention |
Abbreviated Journal |
Accident Analysis & Prevention |
| Volume |
119 |
Issue |
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Pages |
23-28 |
| Keywords |
Security; Public Safety; Lighting |
| Abstract |
Reducing the potential for crashes involving front line service workers and passing vehicles is important for increasing worker safety in work zones and similar locations. Flashing yellow warning beacons are often used to protect, delineate, and provide visual information to drivers within and approaching work zones. A nighttime field study using simulated workers, with and without reflective vests, present outside trucks was conducted to evaluate the effects of different warning beacon intensities and flash frequencies. Interactions between intensity and flash frequency were also analyzed. This study determined that intensitiesof 25/2.5 cd and 150/15 cd (peak/trough intensity) provided the farthest detection distances of the simulated worker. Mean detection distances in response to a flash frequency of 1 Hz were not statistically different from those in response to 4 Hz flashing. Simulated workers wearing reflective vests were seen the farthest distances away from the trucks for all combinations of intensity and flash frequency. |
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| ISSN |
0001-4575 |
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no |
Call Number  |
GFZ @ kyba @ |
Serial |
1950 |
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| Author |
Davidovic, M.; Djokic, L.; Cabarkapa, A.; Kostic, M. |
| Title |
Warm white versus neutral white LED street lighting: Pedestrians' impressions |
Type |
Journal Article |
| Year |
2018 |
Publication |
Lighting Research & Technology |
Abbreviated Journal |
Lighting Research & Technology |
| Volume |
in press |
Issue |
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Pages |
147715351880429 |
| Keywords |
Psychology; Security |
| Abstract |
The subjective impressions of pedestrians are necessary in order to decide on the appropriate colour of light to be used for street lighting. Therefore, a pilot project aimed to compare subjective evaluations of the sidewalk illumination under two street lighting installations, realised by LEDs of 3000 K (warm white) and 4000 K (neutral white), was recently conducted in Belgrade. Both installations had comparable sidewalk illuminances as well as other relevant photometric parameters. The evaluation was done through a questionnaire. A group of 139 (61 male and 78 female) respondents, all of them university students, was asked to grade both lighting installations for the sidewalk light intensity, the appearance of human faces, the colour of light and the colour rendering as well as the overall impression. According to the median values, the 3000 K LED installation was considered better than the 4000 K installation for all aspects assessed as well as the overall impression. Although the survey results convincingly showed a preference for 3000 K LEDs for this comparison, additional research is needed using a more representative sample of people and a wider range of locations before a definite conclusion can be reached. |
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| ISSN |
1477-1535 |
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no |
| Call Number |
GFZ @ kyba @ |
Serial |
2045 |
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| Author |
Fotios, S.; Monteiro, A.L.; Uttley, J. |
| Title |
Evaluation of pedestrian reassurance gained by higher illuminances in residential streets using the day–dark approach |
Type |
Journal Article |
| Year |
2018 |
Publication |
Lighting Research & Technology |
Abbreviated Journal |
Lighting Research & Technology |
| Volume |
in press |
Issue |
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Pages |
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| Keywords |
Vision; Psychology; Security |
| Abstract |
A field study was conducted to investigate how changes in the illuminance affect pedestrian reassurance when walking after dark in an urban location. The field study was conducted in daytime and after dark in order to employ the day–dark approach to analysis of optimal lighting. The results suggest that minimum illuminance is a better predictor of reassurance than is mean illuminance. For a day–dark difference of 0.5 units on a 6-point response scale, the results suggest a minimum horizontal illuminance of approximately 2.0 lux. |
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| ISSN |
1477-1535 |
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no |
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GFZ @ kyba @ |
Serial |
2159 |
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| Author |
Suk, J.Y.; Walter, R.J. |
| Title |
New nighttime roadway lighting documentation applied to public safety at night: A case study in San Antonio, Texas |
Type |
Journal Article |
| Year |
2019 |
Publication |
Sustainable Cities and Society |
Abbreviated Journal |
Sustainable Cities and Society |
| Volume |
46 |
Issue |
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Pages |
101459 |
| Keywords |
Lighting; Public Safety; Security; Planning |
| Abstract |
Built environment and public safety professionals view street lighting as an important factor in improving the well-being of the community at night. Extant research that has examined the relationship between street lighting and public safety has found inconclusive or mixed results and has called for more extensive lighting metrics. Using new lighting measurement technologies and geographic information science, this study builds on previous work to demonstrate new metrics to consider when evaluating public safety, specifically crime and traffic accidents. Downtown San Antonio, Texas is used as a case study to explore illuminance levels on roadways and the driver’s eye, and how these metrics can be used to understand the lighting characteristics of where crime and traffic accidents occur. The findings indicate that the central downtown district in San Antonio has higher illuminance levels than the existing roadway lighting guidelines while the residential downtown neighborhoods have insufficient light levels. Statistical analysis reveals that roadway illuminance levels are higher in areas where no crime occurred and driver’s eye illuminance levels are lower in areas with no traffic accidents. The findings prove the usefulness of new lighting documentation techniques and support the importance of considering illuminance metrics when assessing crime and traffic accidents at night. |
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| ISSN |
2210-6707 |
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no |
| Call Number |
GFZ @ kyba @ |
Serial |
2191 |
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| Author |
DeCoursey, W., Braun, D., & Oza, J. |
| Title |
Pedestrian Lighting, Acceptable Levels of Light: A Pilot Project |
Type |
Journal Article |
| Year |
2019 |
Publication |
Institute for Public Administration |
Abbreviated Journal |
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Issue |
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Pages |
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| Keywords |
Lighting; Public Safety; Security |
| Abstract |
This pilot project study was intended to demonstrate that assessing the adequacy of an area’s pedestrian lighting need not be an expensive, time-consuming, or overly complicated process. Though the discussion of methods of pedestrian lighting can become quite technical and involved, as demonstrated in a 2016 IPA report on the topic, “Delaware Transportation Lighting Inventory & Assessment” (http://www.ipa.udel.edu/publications/transportationlighting-2016.pdf), simply observing and recording light levels in a given study area is quite straightforward. |
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no |
| Call Number |
IDA @ intern @ |
Serial |
2710 |
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