EXTENSION AND PRELIMINARY VALIDATION OF A SIMULATION OF LOAD FACTOR AT SIGNALIZED INTERSECTIONS

THIS INVESTIGATION INTO THE LOAD FACTOR WHICH WAS PROPOSED IN THE 1965 HIGHWAY CAPACITY MANUAL UTILIZED THE BASIC SIGNALIZED INTERSECTION PROGRAM WHICH WAS FIRST REPORTED IN THE FEB 68 ISSUE OF THE SAME JOURNAL. THE PROGRAM WAS MODIFIED TO ALLOW THE USE OF THE COMPOSITE EXPONENTIAL HEADWAY DISTRIBUTION AND MEASURED FIELD HEADWAYS. AMBER PHASE DECISIONS WERE BASED ON OLSON AND ROTHERY. DISCHARGE QUEUE HEADWAYS WERE BASED ON GREENSHIELDS' 1947 WORK. THE RESULTS FROM SIMULATION RUNS WERE 'QUITE CLOSE' TO THE FIELD MEASUREMENTS. DISCREPANCIES WERE FOUND BETWEEN THE SIMULATION, FIELD WORK, AND THE 1965 HIGHWAY CAPACITY MANUAL. VERY GENERAL CONCLUSIONS WERE DRAWN. THE AUTHORS PROPOSED A NEW LEVEL OF SERVICE DISTRIBUTION. /BPR/

• Supplemental Notes:
  • Vol 40, pp 46-52
• Authors:
  • May, A D
  • Gyamfi, P
• Publication Date: 0

Media Info

• Serial:
  • Traffic Engineering, Inst Traffic Engr
  • Volume: 44
  • Issue Number: 1

Subject/Index Terms

• TRT Terms: Headways; Highway capacity; Intersections; Load factor; Manuals; Queuing; Traffic signals; Traffic simulation
• Subject Areas: Highways; Operations and Traffic Management;

Filing Info

• Accession Number: 00227248
• Record Type: Publication
• Source Agency: Traffic Systems Reviews & Abstracts
• Files: TRIS
• Created Date: Jul 6 1970 12:00AM