Motion monitoring devices have been developed to provide warning activation at grade crossings by signaling the actual approach of a train because conventional crossing protection systems are unable to differentiate between a stopped and moving train. The motion monitor detects the rate of change of track impedance to indicate train movement In the design, the frequency ballast, distance to train and terminating shunts and their effect on the motion sensing equipment must be considered. Problems can be encountered with broken rail protection.

  • Supplemental Notes:
    • Presented to the Committee "D" Workshop, Association of American Railroads, Communications and Signal Section, at the 1975 Annual Meeting, New Orleans, Louisiana.
  • Corporate Authors:

    Westinghouse Air Brake Company

    Wilmerding, PA  United States 
  • Authors:
    • Blazek, F V
  • Publication Date: 1975-10

Media Info

  • Features: Figures;
  • Pagination: 12 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00141428
  • Record Type: Publication
  • Report/Paper Numbers: Bull. N. 310 Conf Paper
  • Files: TRIS
  • Created Date: Nov 3 1976 12:00AM