IMPROVED CRITERIA FOR TIMING TRAFFIC SIGNAL SYSTEMS IN URBAN NETWORKS

NINE ADVANCED METHODS OF TRAFFIC SIGNAL CONTROL IN URBAN STREET NETWORKS WERE EVALUATED EXPERIMENTALLY IN LOS ANGELES AND SAN JOSE, CALIF.. FIELD STUDIES WERE PRECEDED BY DEVELOPMENT AND COMPUTER SIMULATION AND TESTING. THE FIELD TESTS WERE RUN BETWEEN 3 AND 6 PM, DIVIDED EQUALLY INTO OFF-PEAK AND PEAK TRAFFIC CONDITIONS. IT WAS FOUND THAT ANY OF THE METHODS, IF SYSTEMATICALLY IMPLEMENTED, WOULD RESULT IN A SIGNIFICANT IMPROVEMENT. THE SIMPLE METHODS PROVED AS EFFECTIVE AS THE COMPLEX. ANOTHER RESULT WAS THAT SHORT SIGNAL CYCLES DECREASE DELAY AND INCREASE AVERAGE SPEED.

• Record URL:
  http://onlinepubs.trb.org/onlinepubs/nchrp/nchrp_rrd_26.pdf
• Supplemental Notes:
  • Nchrp PROJECT 3-5, 1 FIG. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.
• Publication Date: 1971-1

Media Info

• Media Type: Digital/other
• Pagination: 3 p.
• Serial:
  • NCHRP Research Results Digest
  • Issue Number: 26
  • Publisher: Transportation Research Board

Subject/Index Terms

• TRT Terms: Computers; Simulation; Streets; Traffic control; Traffic delays; Traffic flow; Traffic signal timing; Traffic signals
• Old TRIS Terms: Traffic control systems
• Subject Areas: Highways; Operations and Traffic Management;

Filing Info

• Accession Number: 00225941
• Record Type: Publication
• Files: TRIS, TRB
• Created Date: Apr 18 1971 12:00AM