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.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/20460430
• Authors:
  • Liu, Chiu
  • Wang, Zhongren
• Publication Date: 2012

Language

• English

Media Info

• Media Type: Print
• Features: Figures; References;
• Pagination: pp 297-303
• 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