A RECOMMENDED CLEARANCE INTERVAL SIGNAL INDICATION FOR PROTECTED LEFT TURNS

THIS RESEARCH WAS AN EFFORT TO DEVELOP A STANDARD CLEARANCE INTERVAL INDICATION, USING A SINGLE SIGNAL HEAD, FOR THE SITUATION WHERE A PROTECTED LEFT TURN MOVEMENT AT AN INTERSECTION IS TO BE TERMINATED WHILE THE STRAIGHT-THROUGH MOVEMENT CONTINUES. FROM A QUESTIONNAIRE SURVEY OF TRAFFIC ENGINEERS IT WAS FOUND THAT A VARIETY OF LEFT TURN SIGNAL INDICATIONS ARE BEING USED THROUGHOUT THE COUNTRY. LABORATORY AND FIELD STUDIES WERE CONDUCTED TO STUDY DRIVER RESPONSE TO DIFFERENT SIGNALS. STUDY CONCLUSIONS ARE GIVEN AND RECOMMENDATIONS MADE.

• Supplemental Notes:
  • WVA DH RES PROJ 31
• Corporate Authors:

  West Virginia University, Morgantown

  Morgantown, WV  United States  26506

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • King, L Ellis
  • Plummer, R W
• Publication Date: 1973-3

Media Info

• Features: Figures;
• Pagination: 4 p.
• Serial:
  • Issue Number: 1

Subject/Index Terms

• TRT Terms: Clearance interval (Traffic signal cycle); Field studies; Laboratory studies; Left turns; Standardization; Traffic signals
• Subject Areas: Highways; Operations and Traffic Management;

Filing Info

• Accession Number: 00226733
• Record Type: Publication
• Files: TRIS, USDOT
• Created Date: Aug 22 1973 12:00AM