IMPROVED CRITERIA FOR TRAFFIC SIGNAL SYSTEMS IN URBAN NETWORKS

THE TWO PRINCIPLE OBJECTIVES OF THE RESEARCH WERE (1) TO TEST AND COMPARE COMPUTER SIMULATIONS OF TRAFFIC SIGNAL SYSTEMS, AND THEN TO MAKE FIELD VERIFICATIONS; AND (2) TO VERIFY THE ABILITY OF COMPUTER SIMULATION METHODS TO PREDICT ACCURATELY THE EFFECTS OF SIGNAL TIMING MODIFICATIONS. A VARIETY OF METHODS WAS EMPLOYED IN DIFFERENT COMBINATIONS. TWO GRID NETWORKS WERE USED AS TEST SITES: A 26-INTERSECTION SITE IN LOS ANGELES (PEAK HOUR FLOWS, 175--1475) AND A 22- INTERSECTION SITE IN SAN JOSE (PEAK HOUR FLOWS, 250-- 1200). IN LOS ANGELES, THE PEAK AND OFF-PEAK INCREASES IN AVERAGE NETWORK SPEED WERE 17--24 AND 18--22%, RESPECTIVELY. IN SAN JOSE, WHERE THE EXISTING SYSTEM IS OPERATED BY AN IBM 1800 TRAFFIC CONTROL COMPUTER USING A LIBRARY OF STRATEGIC TIMING PLANS, THE INCREASE FOR THE BEST TIMMING PLAN WAS ABOUT 5%.

  • Availability:
  • Supplemental Notes:
    • 86 PP, FIGS, TABS, 2L REF, 9 APP
  • Authors:
    • Wagner, F A
    • Barnes, F C
    • Gerlough, D L
  • Publication Date: 1971

Media Info

  • Serial:
    • NCHRP Report
    • Issue Number: 124
    • Publisher: Transportation Research Board
    • ISSN: 0077-5614

Subject/Index Terms

Filing Info

  • Accession Number: 00226137
  • Record Type: Publication
  • Files: TRIS, ATRI
  • Created Date: Mar 7 1972 12:00AM