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

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:

• Flashing Yellow Arrows Tool: Determining Time of Day Use
• Driver Comprehension of Flashing Yellow Arrows

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