OPTIMAL TRAFFIC SIGNAL SETTINGS-PART 1: CRITERION FOR UNDERSATURATION OF A SIGNALIZED INTERSECTION AND OPTIMAL SIGNAL SETTING; PART 2: A REFINEMENT OF WEBSTER'S METHOD

THE FIRST PAPER DEALS WITH AN OPTIMAL SIGNAL SETTING OF A FIXED-CYCLE TRAFFIC SIGNAL BASED UPON A NEW CRITERION OF MINIMIZING A DEGREE OF SATURATION OF A SIGNALIZED INTERSECTION. AS PRELIMINARIES, A CRITERION FOR UNDERSATURATION OF THE SIGNALIZED INTERSECTION IS DERIVED AS THE DEGREE OF SATURATION OF THE SIGNALIZED INTERSECTION AND MEAN EFFECTIVE GREEN TIMES OF STREAMS OF LOWER PRIORITIES ARE DETERMINED AS LINEAR FUNCTIONS OF THE GREEN TIMES AND CYCLE TIME. THE OPTIMAL SIGNAL SETTING PROBLEM CAN BE SOLVED RESPECTIVELY BY LINEAR PROGRAMMING IN CASE OF NONOVERLAPPING OR OVERLAPPING PHASES AND BY MIXED-INTEGER PROGRAMMING IN CASE OF GENERALIZED OVERLAPPING PHASES. IN THE SECOND PAPER AN OPTIMAL SIGNAL SETTING OF A FIXED-CYCLE TRAFFIC SIGNAL IS BASED UPON THE CRITERION OF MINIMUM OVERALL DELAY. WEBSTER'S METHOD WHICH IS AN APPROXIMATION METHOD FOR THE OPTIMAL SIGNAL SETTING IS THEORETICALLY ELUCIDATED. FURTHERMORE, APPROXIMATION ALGORITHMS WHICH ARE A REFINEMENT OF WEBSTER'S METHOD AND ARE APPLICABLE TO ALL TRAFFIC SIGNALS ARE PRESENTED. THE ALGORITHMS ARE A COMBINATION OF LINEAR PROGRAMMING OR MIXED-INTEGER PROGRAMMING AND ONE-DIMENSIONAL MINIMIZATION TECHNIQUE. /AUTHOR/

• Corporate Authors:

  Pergamon Press, Incorporated

  Maxwell House, Fairview Park
  Elmsford, NY  United States  10523
• Authors:
  • Ohno, K
  • Mine, H
• Publication Date: 1973-9

Media Info

• Pagination: 48 p.
• Serial:
  • Transportation Research /UK/
  • Volume: 7
  • Issue Number: 3
  • Publisher: Pergamon Press, Incorporated

Subject/Index Terms

• TRT Terms: Algorithms; Green interval (Traffic signal cycle); Linear programming; Optimization; Percent saturation; Pretimed traffic signal controllers; Signalized intersections; Traffic delays; Traffic signal timing
• Subject Areas: Highways; Operations and Traffic Management;

Filing Info

• Accession Number: 00226802
• Record Type: Publication
• Files: TRIS
• Created Date: Jan 31 1974 12:00AM