Adding Signals to Coordinated Traffic Signal Systems

The purpose of this research was to investigate the effect of adding or removing traffic signals within a coordinated, signal-controlled street network. The report includes a discussion of coordinated signal systems; arterial street network configurations; optimization of signal settings for progressive movements; simulation of traffic on street networks with specified off-peak vehicular volumes and different intersection control strategies; and analyses of statistical data resulting from the simulation of traffic on several representative street networks. A signal timing optimization program, PASSER II, was used to determine the signal timing patterns for each of twelve representative street networks that were operated under different control strategies. The computer program called NETSIM was then used to simulate traffic on the networks and produce statistics concerning the relative effectiveness of the various control schemes. A total of 98 different network cases were simulated by NETSIM. The best practicable estimate of the effects of altering the number of signalized intersections in a network can be made by applying computer optimization and simulation techniques directly to the specific before and after situations under consideration. This requires the use of computers and experienced personnel. Approximate methods for estimating these effects without using a computer are described in this report.

  • Record URL:
  • Supplemental Notes:
    • Research Study Title: Warrants for Traffic Signals Within A Coordinated System.
  • Corporate Authors:

    University of Texas, Austin

    Center for Transportation Research, 3208 Red River Street
    Austin, TX  United States  78705

    Texas State Department of Highways & Public Transportation

    Transportation Planning Division, P.O. Box 5051
    Austin, TX  United States  78763

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Machemehl, Randy B
    • Lee, Clyde E
  • Publication Date: 1983-8


  • English

Media Info

  • Media Type: Digital/other
  • Edition: Final Report
  • Features: Appendices; Figures; References; Tables;
  • Pagination: 91p

Subject/Index Terms

Filing Info

  • Accession Number: 01632467
  • Record Type: Publication
  • Report/Paper Numbers: FHWA/TX-84/23+260-1F, Research Report 260-1F
  • Contract Numbers: Research Study 3-18-80-260
  • Created Date: Apr 23 2017 5:07PM