Adverse Visibility Information System Evaluation (ADVISE): Interstate 215 Fog Warning System

The purpose of the Adverse Visibility Information System Evaluation (ADVISE) was to evaluate a real-time, motorist warning system. In response to this, the Utah Department of Transportation Research Division managed a project to develop, deploy and evaluate a fog warning system on Interstate 215 south of Salt Lake City, Utah. One of the objectives of the study was to determine if a speed advisory reduced the mean speeds and/or the variability in speeds between vehicles during low visibility fog events. The conclusion of this study was that a fog warning system appears to be most influential on exceptionally slow moving vehicles/drivers, which after seeing the messages displayed by electronic signs, increase speeds to the predominant traffic flow speed. The use of a speed advisory was considered successful because it reduced the variability between vehicle speeds, a leading cause of incidents.

  • Record URL:
  • Corporate Authors:

    University of Utah, Salt Lake City

    Department of Civil and Environmental Engineering
    122 South Central Campus Drive
    Salt Lake City, UT  United States  84112

    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:
    • Martin, Peter T
    • Perrin, Joseph
    • Coleman, Brad
  • Publication Date: 2003-6


  • English

Media Info

  • Media Type: Web
  • Edition: Final Report
  • Features: Appendices; Figures; Photos; References; Tables;
  • Pagination: 140p

Subject/Index Terms

Filing Info

  • Accession Number: 01001270
  • Record Type: Publication
  • Report/Paper Numbers: UT-02.12, UTL-1001-49
  • Contract Numbers: 00-9117
  • Created Date: Jun 22 2005 12:21PM