RADIATING CABLE PERFORMANCE FOR USE WITH A DRIVER INFORMATION SYSTEM

Techniques for transmitting localized messages to moving vehicles have been investigated at TRRL. Following studies into the feasibility of using radiating cables as the localized transmitting aerial, the aspects of signal decay and standing waves are examined. Of the concepts investigated, the paper considers a system to store pre-recorded verbal phrases covering emergency situations. On receipt of information concerning a road incident, a traffic controller would select the appropriate combination of phrases and route the message over land-lines to a roadside unit. There it would be re-stored and used to modulate a low power transmission to radiate a localized signal. /TRRL/

  • Corporate Authors:

    Institution of Electrical Engineers

    Savoy Place
    London WC2R 0BL, NY  England  10016-5997
  • Authors:
    • Harms, P L
    • Johannessen, R
  • Publication Date: 1976

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 104-107

Subject/Index Terms

Filing Info

  • Accession Number: 00157366
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Report/Paper Numbers: Conf Pub No 141 Analytic
  • Files: ITRD, TRIS
  • Created Date: Oct 13 1977 12:00AM