SUMMARY OF PROJECT 3-18(3) TRAFFIC SIGNAL SYSTEM SURVEYS

A questionnaire survey was conducted which was designed to identify and define the range of traffic surveillance and control system alternatives to which a cost effectiveness methodology (for evaluation of signalized street network surveillance and control systems) is to be applied. Tables and commentaries are presented related to responses from researchers, designers and manufacturers who were asked for both qualitative and quantitative answers to questions about preliminary studies (plans, specifications, estimates), construction, management, and system effectiveness. Information on selection criteria concerning the range of alternative systems use, evaluation, design and implementation of systems, operational and maintenance aspects were collected from systems users. The survey showed that evaluation methodologies must be sensitive to local policies and traffic control philosophies, and expected system levels of performance. Respondents using digital computer systems reported a greater need for engineering personnel, rated components as having lower reliability than agencies with non-digital systems, needed and used more timing plans and felt system flexibility was more important. Findings related to backup capabilities, display map, and the establishment of performance criteria are also reported.

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  • Accession Number: 00132914
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Jun 5 1976 12:00AM