Electronic traffic control equipment is highly susceptible to upset or damage from externally and internally generated electrical noise and transients. Lines providing electrical power and cables interconnecting equipment to sensors, communications systems, or peripheral hardware provide a direct path for the conduction of electrical transients, such as lightning, electrostatic discharge, and inductive switching transients, and electromagnetic interference (EMI), as from nearby radio, TV, radar or mobile communications transmitters, into unprotected equipment. The objectives of this report are to: (1) define the electromagnetic threat to traffic control equipment from these sources, and (2) identify and define protection practices, procedures and techniques to mitigate the effects of the various electromagnetic threaats. The protection practices, procedures, and techniques encompass proper grounding, bonding, shielding, and terminal protection, including the use of filters, amplitude limiters and cable interface designs.

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    • 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
  • Corporate Authors:

    Transportation Research Board

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  • Authors:
    • Denny, H W
    • Rohrbaugh, J P
  • Publication Date: 1989-6

Media Info

  • Features: Figures; References; Tables;
  • Pagination: 88 p.
  • Serial:
    • NCHRP Report
    • Issue Number: 317
    • Publisher: Transportation Research Board
    • ISSN: 0077-5614

Subject/Index Terms

Filing Info

  • Accession Number: 00485581
  • Record Type: Publication
  • ISBN: 0-309-04614-9
  • Files: TRIS, TRB, ATRI
  • Created Date: Jul 31 1989 12:00AM