SIGNALLING...WITHOUT POLE LINES?

As microwave eliminates pole lines, railroad signal departments are confronted with alternatives to their control circuits formerly carried on poles along with communications circuits. Alternatives include buried cable, coded track circuits and audio frequency track circuits. Outside factors may dictate that all, or combinations of any two of these, may have to be utilized for specific applications. The problem as applied to a specific track segment was the subject of a panel discussion at the AAR Communication and Signal Section meeting in 1977.

  • Availability:
  • Corporate Authors:

    Murphy-Richter Publishing Company

    20 North Wacker Driver
    Chicago, IL  USA  60606
  • Publication Date: 1978-1

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00172016
  • Record Type: Publication
  • Source Agency: Progressive Railroading
  • Files: TRIS
  • Created Date: Mar 29 1978 12:00AM