Microcomputers and modems improve traffic flow and reduce congestion for millions of motorists nationwide. The "Closed Loop System" uses an Apple IIe and a Hayes Micromodem IIe to help monitor traffic flow at key intersections. When traffic patterns change because of rush hour or other reasons, the system changes the timing of traffic signals to accomodate the increased traffic. The signals can either be changed automatically based on actual traffic demand or, by time of day or, can be set through a microcomputer from a central location. The system, developed by Transyt Corporation of Tallahassee, Florida saves motorists the time and frustration of sitting in traffic jams and saves minicipalities more than 50 percent on installation, training and maintenance costs. The Tranyst system also helps regional planning by giving officials information on traffic growth and problems. The system is composed of three elements: Local signal controllers, onstreet "masters," and a centrally located Apple IIe. The local signal controllers are linked with the "master" via two pairs of dedicated cable while masters communicate with the central microcomputer using a Hayes Micromodem IIe over standard dial-up lines. (Author)

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  • Corporate Authors:

    International Municipal Signal Association

    P.O. Box 8249
    Fort Worth, TX  United States  76112
  • Authors:
    • Wreden, N
  • Publication Date: 1985-7

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Filing Info

  • Accession Number: 00399499
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Aug 25 2004 2:44AM