AN EVALUATION OF LEADING VERSUS LAGGING LEFT TURN SIGNAL PHASING. EXECUTIVE SUMMARY

This research project includes an evaluation of leading vs. lagging left turn signal phasing and all red clearance intervals. This report presents the results of the part of the research involving leading vs. lagging left turn signal sequences. It was found that, in general, lagging sequences at selected types of intersections can provide safety and delay advantages over the (more common in Indiana) leading sequences. Guidelines were developed on the basis of research results for the use of the leading and lagging signal sequences in Indiana.

• Corporate Authors:

  Purdue University/Indiana Department of Transportation JHRP

  Purdue University, School of Civil Engineering
  West Lafayette, IN  United States  47907-1284

  Indiana Department of Transportation

  100 N Senate Avenue
  Indianapolis, IN  United States  46204

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Hummer, J E
  • Montgomery, R E
  • Sinha, K C
• Publication Date: 1989-12-13

Media Info

• Features: Figures; Tables;
• Pagination: 34 p.

Subject/Index Terms

• TRT Terms: Guidelines; Lagging (Earthwork); Lead-lag phasing; Left turn phase; Traffic delays; Traffic safety
• Old TRIS Terms: Lagging; Left turn phasing
• Subject Areas: Highways; Operations and Traffic Management; I73: Traffic Control;

Filing Info

• Accession Number: 00496597
• Record Type: Publication
• Report/Paper Numbers: FHWA/IN/JHRP-89/17
• Contract Numbers: 1-(24) Part II
• Files: TRIS, USDOT, STATEDOT
• Created Date: Aug 31 1990 12:00AM