Development of guidelines for permitted left-turn phasing using flashing yellow arrows : final report.

Details

• Creators:
  Davis, Gary A. ; Hourdos, John ; Moshtagh, Vahid
• Corporate Creators:
  University of Minnesota. Department of Civil, Environmental, and Geo-Engineering. Minnesota Traffic Observatory ; University of Minnesota. Dept. of Civil, Environmental, and Geo-Engineering
• Corporate Contributors:
  Minnesota. Dept. of Transportation. Research Services & Library
• Subject/TRT Terms:
  • Flashing traffic signals
  • Arrows (Signals)
  • Left turns
  • Crash risk forecasting
  • Traffic models
  • Crash risk forecasting
• Publication/ Report Number:
  MN/RC 2015-27
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States ; Minnesota
• Edition:
  Final report
• Corporate Publisher:
  Minnesota. Dept. of Transportation. Research Services & Library
• Abstract:
  The objective of this project was to develop guidelines for time-of-day use of permitted left-turn phasing, ; which can then be implemented using flashing yellow arrows (FYA). This required determining how the risk ; for left-turn crashes varied as traffic-flow conditions varied during the course of a representative day. This ; was accomplished by developing statistical models, which expressed the risk of occurrence of a left-turn ; crash during a given hour as a function of the left-turn demand, the opposing traffic volume, and a ; classification of the approach with respect to the opposing traffic speed limit, the type of left-turn protection, ; and whether or not opposing left-turn traffic could obstruct sight distance. The models were embedded in a ; spreadsheet tool which will allow operations personnel to enter, for a candidate intersection approach, ; existing turning movement counts, and a classification of the approach with respect to speed limit, turn ; protection, and sight distance issues and receive a prediction of how the risk of left-turn crash occurrence ; varies throughout the day, relative to a user-specified reference condition.
  More +
• Format:
  PDF
• Funding:
  CTS # 2013025 ; (c) 99008 (wo) 63
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/32169/dot_32169_DS1.pdf
• File Type:
  [PDF - 3.04 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:28256dbb168b4b3f214c7219ec76f2603458ccd8d502e8fb46b854bb4a33efd4