SINGLE-POINT INTERCHANGES: A SAFETY AUDITOR'S PERSPECTIVE

This paper on single-point interchanges (SPI) is from a set of conference proceedings on Intersection Safety: Achieving Solutions Through Partnerships. The SPI design is typically implemented where limited land is available for the interchange. The resulting compact design can result in a challenging interchange, particularly for unfamiliar drivers or under adverse conditions (such as rain or dark). The authors have conducted detailed-design and in-service road safety audits of single-point interchanges (SPIs) which identified several design elements common to SPIs that could be challenging to road users (particularly unfamiliar users). These elements include geometric and sight distance constraints, large intersection area with unconventional turning paths, safe accommodation of pedestrians and cyclists, impacts of nearby intersections in urbanized areas, and signal display and signing. The authors report on detailed audit reviews of SPI designs in western Canada, and observations of a functioning SPI in Maryland. They discuss mitigation measures to address design elements that entail a significant collision risk.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0935403825
• Supplemental Notes:
  • Full conference proceedings available on CD-ROM.
• Corporate Authors:

  Institute of Transportation Engineers (ITE)

  Washington, DC  United States 
• Authors:
  • Gibbs, M M
  • Chan, B
  • Zein, S R
• Conference:
  • Intersection Safety: Achieving Solutions Through Partnerships
  • Location: Irvine, California
  • Date: 2004-3-28 to 2004-3-31
• Publication Date: 2004

Language

• English

Media Info

• Features: Figures; Photos;
• Pagination: 11p

Subject/Index Terms

• TRT Terms: Conferences; Interchange ramps; Interchanges and intersections; Intersections; Merging area; Traffic engineering; Traffic lanes; Traffic safety
• Geographic Terms: Canada; Maryland
• Subject Areas: Highways; Operations and Traffic Management; Planning and Forecasting; Safety and Human Factors; I72: Traffic and Transport Planning;

Filing Info

• Accession Number: 00988943
• Record Type: Publication
• ISBN: 0935403825
• Files: TRIS
• Created Date: Apr 15 2005 12:00AM