Deriving Sight Distance on a Compound Sag and Circular Curve in a Three Dimensional Space
Insufficient roadway sight distance (SD) may become a contributing factor to traffic collisions and other unsafe traffic maneuvers. By considering human-vehicle-roadway interactions, a unified analytic framework integrating the vehicle headlight height and a three dimensional (3-d) compound sag and curve is established to determine the SD experienced by a driver traveling through this 3-d compound curve. Three dimensional compound sag and circular curves are often found along ramps, connectors and mountain roads. Practitioners can easily program these formulations on user-friendly Microsoft Excel spreadsheets to calculate a 3-d SD on most roadways with roadside clearance. This framework can be extended to SD on roadways with obstacles partially blocking vehicle headlight beams.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/20460430
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Authors:
- Liu, Chiu
- Wang, Zhongren
- Publication Date: 2012
Language
- English
Media Info
- Media Type: Print
- Features: Figures; References;
- Pagination: pp 297-303
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Serial:
- International Journal of Transportation Science and Technology
- Volume: 1
- Issue Number: 3
- Publisher: Elsevier
- ISSN: 2046-0430
- Serial URL: http://www.sciencedirect.com/science/journal/20460430
Subject/Index Terms
- TRT Terms: Crashes; Headlamps; Highway curves; Mathematical models; Operating speed; Sight distance
- Subject Areas: Highways; Safety and Human Factors; I82: Accidents and Transport Infrastructure;
Filing Info
- Accession Number: 01447650
- Record Type: Publication
- Files: TRIS
- Created Date: Sep 28 2012 10:42AM