KANSAS CITY USES COMPUTER TO OPTIMIZE DOWNTOWN TRAFFIC SIGNALS

THE SIGNAL OPTIMIZATION PROGRAM (SIGPO) IS DESCRIBED; BASICALLY IT PROVIDES A COMPUTERIZED ANALYSIS OF MULTIPLE VARIABLES AND REQUIREMENTS NECESSAY FOR SOLVING TRAFFIC PROBLEMS. BY ASSIGNING A SEPARATE NUMBER TO EACH INTERSECTION (CODE) AND TO TRAFFIC RUNS (LINKS), THE MASTER CODING PROGRAM FOR THE WHOLE PROGRAM WAS WORKED OUT. SIGOP IS A COMPLEX SET OF COMPUTER INSTRUCTIONS WRITTEN IN FORTRAN IV AND CONVERTED FOR EXECUTION UNDER THE IBM SYSTEM/360 OPERATING SYSTEM. THE FUNCTIONS OF THE SEVERAL PROGRAM BLOCKS ARE: (1) INPUT PROGRAM--READS AND VERIFIES THE BASIC DATA, CHECKING IT FOR INTERNAL LOGIC AND CONSISTENCY. (2) PHASE PROGRAM--COMPUTES PHASE SPLITS FOR EACH INTERSECTION FOR A GIVEN TRIAL CYCLE LENGTH. (3) OFFSET PROGRAM--COMPUTES THE IDEAL DIFFERENCE IN OFFSETS AMONG THE NETWORK LINKS. (4) OPTIMIZ PROGRAM--PRODUCES A SET OF SIGNAL OFFSETS FOR THE NETWORK. (5) VALUAT PROGRAM--USES A SIMPLIFIED NETWORK TRAFFIC SIMULATION TO CALCULATE THE SYSTEM PROPENSITY TO GENERATE DELAY, STOPS AND COST FOR A GIVEN SET OF CYCLE LENGTHS, PHASE SPLITS, AND OFFSETS, AND (6) OUTPUT PROGRAM--PRESENTS RECOMMENDED PHASE SPLITS AND OFFSETS IN THE FORM OF A TABLE OF DIAL SETTINGS.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/1519687
• Supplemental Notes:
  • Vol 41, No 5, PP 12-15, 2 FIG
• Authors:
  • Karmeier, D F
• Publication Date: 1971-5

Media Info

• Serial:
  • Better Roads
  • Publisher: James Informational Media, Incorporated
  • ISSN: 0006-0208
  • Serial URL: http://www.betterroads.com

Subject/Index Terms

• TRT Terms: Coding systems; Computer programs; Computers; Intersections; Optimization; Traffic signals
• Identifier Terms: FORTRAN (Computer program language)
• Old TRIS Terms: Coding
• Subject Areas: Highways; Operations and Traffic Management;

Filing Info

• Accession Number: 00226101
• Record Type: Publication
• Files: TRIS
• Created Date: Dec 20 1971 12:00AM