Effectiveness of clear-lens turn signals in direct sunlight
dc.contributor.author | Sivak, Michael | en_US |
dc.contributor.author | Schoettle, B. | en_US |
dc.contributor.author | Flannagan, M.J. | en_US |
dc.contributor.author | Minoda, T. | en_US |
dc.date.accessioned | 2007-12-13T14:46:32Z | |
dc.date.available | 2007-12-13T14:46:32Z | |
dc.date.issued | 2005-07 | |
dc.identifier | 98926 | en_US |
dc.identifier.other | UMTRI-2005-19 | en_US |
dc.identifier.uri | https://hdl.handle.net/2027.42/57446 | |
dc.description.abstract | Current front turn-signal lamps in the U.S. predominantly use clear lenses and amber bulbs. However, clear-lens lamps are more susceptible than amber-lens lamps to sun reflections that may be interpreted as turn signals (sun phantoms). In this study, we quantified the relevant photometric differences in direct sunlight between these two lamp types for a large sample of current lamps, and presented inferences for likely effects on driver performance. Although our data confirm that, in general, clear-lens lamps are likely to provide signals that are less discriminable, the variability within each lamp type is large. In other words, some clear-lens turn lamps currently on the road are likely to be resistant to sun phantoms, and some amber-lens lamps are not. The report also discusses the desirable photometric levels of turn signals for effective performance in direct sunlight. Finally, it is argued that an indirect benefit of turn-signal lamps that are near low-beam headlamps is that, because of their higher required intensities, they are likely to be less susceptible to sun phantoms than lamps farther away from low beams. | en_US |
dc.description.sponsorship | Michigan University, Ann Arbor, Industry Affiliation Program for Human Factors in Transportation Safety | en_US |
dc.format.extent | 18 | en_US |
dc.format.extent | 566451 bytes | |
dc.format.mimetype | application/pdf | |
dc.language | English | en_US |
dc.publisher | University of Michigan, Ann Arbor, Transportation Research Institute | en_US |
dc.subject.other | Sunshine | en_US |
dc.subject.other | Lighting Systems/ Signal Systems | en_US |
dc.subject.other | Candlepower/ Lumens | en_US |
dc.subject.other | Brightness/ Light Intensity/ Illumination | en_US |
dc.subject.other | Optical Measurements/ Photometry | en_US |
dc.subject.other | Laboratory Experiments | en_US |
dc.subject.other | Turn Signals | en_US |
dc.subject.other | Effectiveness | en_US |
dc.title | Effectiveness of clear-lens turn signals in direct sunlight | en_US |
dc.type | Technical Report | en_US |
dc.subject.hlbsecondlevel | Transportation | |
dc.subject.hlbtoplevel | Engineering | |
dc.description.bitstreamurl | http://deepblue.lib.umich.edu/bitstream/2027.42/57446/1/98926.pdf | en_US |
dc.owningcollname | Transportation Research Institute (UMTRI) |
Files in this item
Remediation of Harmful Language
The University of Michigan Library aims to describe library materials in a way that respects the people and communities who create, use, and are represented in our collections. Report harmful or offensive language in catalog records, finding aids, or elsewhere in our collections anonymously through our metadata feedback form. More information at Remediation of Harmful Language.
Accessibility
If you are unable to use this file in its current format, please select the Contact Us link and we can modify it to make it more accessible to you.