SUN POSITION AND TWILIGHT TIMES FOR DRIVER VISIBILITY ASSESSMENT
The sun can be a substantial glare source when shining in a driver's eyes when the sun is low on the horizon after sunrise or before sunset, or at virtually any time during daylight hours if the object of concern presents itself at the same altitude and azimuth as the sun. Second, the ambient light levels during the civil twilight period, either before sunrise (dawn) or after sunset (dusk), are brighter than complete darkness, yet are less than normal daylight driving conditions. Methods are presented for calculating the times of sunrise and sunset, the times of civil twilight darker limit, the angular position of the sun, for any time, and date, and for estimating the natural light levels at the time of the incident, to enable an assessment of driver visibility. (A) For the covering abstract of the conference see IRRD 882390.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/isbn/1560916338
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Corporate Authors:
Society of Automotive Engineers (SAE)
400 Commonwealth Drive
Warrendale, PA United States 15096 -
Authors:
- MACINNIS, D D
- WILLIAMSON, P B
- Nielsen, G P
- Publication Date: 1995-2
Language
- English
Media Info
- Features: References;
- Pagination: p. 263-88
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Serial:
- SAE PUBLICATION SP-1083. ACCIDENT RECONSTRUCTION: TECHNOLOGY AND ANIMATION V. PROCEEDINGS OF THE INTERNATIONAL CONGRESS AND EXPOSITION, FEBRUARY 27-MARCH 2, 1995, DETROIT, MICHIGAN, USA
- Publisher: Society of Automotive Engineers (SAE)
Subject/Index Terms
- TRT Terms: Angularity; Calculation; Conferences; Crash reconstruction; Dusk; Glare; Headlamps; Location; Luminance; Mathematical models; Methodology; Sun; Surfaces; Visibility
- Uncontrolled Terms: Angles
- Geographic Terms: United States
- ITRD Terms: 6427: Angle; 6464: Calculation; 8525: Conference; 9012: Dusk; 1677: Glare; 1342: Headlamp; 9061: Location; 525: Luminance; 6473: Mathematical model; 9102: Method; 1621: Reconstruction (accid); 2515: Sun; 6438: Surface; 8122: USA; 6783: Visibility
- Subject Areas: Data and Information Technology; Design; Safety and Human Factors;
Filing Info
- Accession Number: 00729380
- Record Type: Publication
- Source Agency: Institute for Road Safety Research, SWOV
- ISBN: 1-56091-633-8
- Report/Paper Numbers: 950359
- Files: ITRD
- Created Date: Dec 26 1996 12:00AM