Evaluation and Installation Guidelines for Utah Advance Warning Signal Systems

Advance warning signals (AWS) provide information warning drivers in advance of the end-of-green interval for an approaching signalized intersection. The purpose of this research was to develop guidelines for the placement of AWS in Utah, both conditions to evaluate the need for AWS installation and guidelines for the AWS system design. The conditions were based on a detailed literature review and were developed using the Policy Delphi method. Six conditions are recommended and discussed in detail, including: limited sight distance, posted speed, isolated intersection, high crash rate, approach grade, and heavy vehicle traffic volume. The guidelines for the AWS system design included details about three components: AWS component, advance detection component, and signal timing component. An evaluation matrix was developed by the Policy Delphi method for the purpose of evaluating and prioritizing a group of intersections for AWS installation.

• Record URL:
  • https://drive.google.com/file/d/1E8SPX3_BTTsCuBer5v8a1MRkItZblbJe/view?usp=sharing
• Corporate Authors:

  Brigham Young University

  Department of Civil and Environmental Engineering
  Provo, UT  United States  84602

  Utah Department of Transportation

  Research and Development Division, 4501 South 2700 West, P.O. Box 148410
  Salt Lake City, UT  United States  84119-8410
• Authors:
  • Schultz, Grant G
  • Jensen, Aaron Paul
• Publication Date: 2007-9

Language

• English

Media Info

• Media Type: Web
• Features: Appendices; Figures; Photos; References; Tables;
• Pagination: 144p

Subject/Index Terms

• TRT Terms: Crash rates; Delphi method; Guidelines; Heavy vehicles; Highway grades; Installation; Isolated intersections; Literature reviews; Sight distance; Speed limits; Strategic planning; System design; Traffic signal timing; Traffic signals
• Uncontrolled Terms: Advance detection; Advance warning
• Subject Areas: Highways; Maintenance and Preservation; Operations and Traffic Management; I73: Traffic Control;

Filing Info

• Accession Number: 01079048
• Record Type: Publication
• Report/Paper Numbers: UT-07.06
• Files: TRIS, STATEDOT
• Created Date: Oct 17 2007 3:17PM