Development of Guidelines for Permitted Left-Turn Phasing Using Flashing Yellow Arrows

Status: Complete
Report Date: 06/29/2015

Summary:

MnDOT has instituted a policy to install flashing yellow arrows on all new signal heads. The purpose of this research was to determine the risk of using flashing yellow arrows at various times during the day. More data is needed but the research team was able to develop a tool to provide a risk value. Find the tool and an instructional video under related materials below.

Final Deliverables:

Development of Guidelines for Permitted Left-Turn Phasing Using Flashing Yellow Arrows (Report #2015-27)
Determining Relative Risk for Permitted Left-Turn Phasing Using Flashing Yellow Arrows (Research Summary)

Related Materials:

Flashing Yellow Arrows Tool Instructional Video (Video/Webinar)
Flashing Yellow Arrow Decision Tool Instructions (Brochure/Handout)
Flashing Yellow Arrow Decision Tool (Spreadsheet Tool)
Development of Guidelines for Permitted Left-Turn Phasing Using Flashing Yellow Arrows (News/Publication Article)
New Permitted Left-Turn Model Helps Improve Intersection Safety (Blog Post)

Related Research:

Project Personnel:

Principal Investigator: Gary Davis
Technical Liaison: Susan Zarling
Project Coordinator: Alan Rindels
Panel Members:
    Bryan Nemeth - Bolton & Menk Inc Consulting
    Gary Davis - University of Minnesota
    Jerry Kotzenmacher - Traffic Engineering
    Joe Gustafson - Washington County Public Works - Engineer
    Kevin Schwartz - Metro District
    Mark Ray - City of Burnsville
    Randall Laninga - Illinois Department of Transportation
    Wayne Sandberg - Washington County