Technical Reports

Potential Means of Cost Reduction in Grade Crossing Motorist-Warning Control Equipment Volume I: Overview, Technology Survey and Relay Alternatives

  • 01
  • Dec
  • 1977
AUTHOR: Federal Railroad Administration
OFFICE: RPD
SUBOFFICE: RPD-30
REPORT NUMBER: DOT/FRA/ORD-77/45.I
KEYWORDS: Railroad-Highway Grade Crossings; Grade Crossing Warning Systems; Grade Crossing Signal Systems
ABSTRACT: The results of a recent study of railroad-highway grade crossing warning system technology are presented. Emphasis in the investigation was placed on the determination of the potential for significant reduction in equipment, installation and maintenance costs through improvements sought within a framework of the basic (track circuit) system concepts now prevalent. This study comprises a comprehensive survey of current practices and hardware) an analysis of all major cost elements, and a consideration of potentially beneficial technical changes. The effort is concentrated on the equipment involved in train detection and the activation of warning devices. Special attention is given to European practices. The applicability of European signal relays and of mercury-wetted reed relays to the North American situation is analyzed.

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