SIGSET: A COMPUTER PROGRAM FOR CALCULATING TRAFFIC SIGNAL SETTINGS

SIGSET IS A FORTRAN PROGRAM WHICH CALCULATES TRAFFIC SIGNAL SETTINGS AT SINGLE ROAD JUNCTIONS. THE GREEN TIMES AND, IF REQUIRED, THE CYCLE TIME ARE CALCULATED SO AS TO MINIMIZE, SUBJECT TO SPECIFIED CONSTRAINTS, THE ESTIMATED DELAY PER UNIT TIME TO ALL TRAFFIC PASSING THROUGH THE JUNCTION WHEN THE SIGNALS ARE WORKING FIXED-TIME. IN THE CASE OF VEHICLE-ACTUATED SIGNALS, THIS OCCURS WHEN THE GREEN TIME RUNS TO MAXIMUM FOR EACH PART OF THE SIGNAL CYCLE. THE PROGRAM IMPROVES ON EARLIER METHODS BY TAKING ALL TRAFFIC STREAMS INTO ACCOUNT, INSTEAD OF ONLY SELECTED ONES; BY MINIMIZING THE ESTIMATED DELAY EXACTLY, INSTEAD OF ONLY APPROXIMATELY; AND BY BEING ABLE TO DEAL EQUALLY WELL WITH BOTH SIMPLE AND COMPLICATED JUNCTION LAYOUTS AND SIGNAL CYCLES. AS A RESULT, THE ESTIMATED DELAY CORRESPONDING TO SETTINGS PRODUCED BY SIGSET IS QUITE OFTEN APPRECIABLY LESS THAN THAT CORRESPONDING TO SETTINGS GIVEN BY EARLIER METHODS, ESPECIALLY IN COMPLICATED CASES. EVEN WHEN THERE IS LITTLE IMPROVEMENT IN ESTIMATED DELAY, SIGSET OFTEN INDICATES A SHORTER CYCLE TIME. /RRL/

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00410683
• Supplemental Notes:
  • Vol 13, No 2, PP 58-60, 2 TAB, 6 REF
• Authors:
  • ALLSOP, R E
• Publication Date: 1971-6

Media Info

• Serial:
  • Traffic Engineering & Control
  • Publisher: Hemming Group, Limited
  • ISSN: 0041-0683
  • Serial URL: http://www.tecmagazine.com/

Subject/Index Terms

• TRT Terms: Computer programs; Green interval (Traffic signal cycle); Pretimed traffic signal controllers; Signalization; Traffic actuated controllers; Traffic delays; Traffic flow; Traffic signal controllers; Traffic signal cycle; Traffic signals
• Subject Areas: Highways; Operations and Traffic Management;

Filing Info

• Accession Number: 00225329
• Record Type: Publication
• Source Agency: Road Research Laboratory /UK
• Files: TRIS
• Created Date: Apr 2 1972 12:00AM