Technical Reports

Potential Means of Cost Reduction in Grade Crossing Motorist-Warning Control Equipment. Volume II. Comparison of Solid State and Relay Devices and Techniques

  • 07
  • Dec
  • 1977
AUTHOR: Holmstrom, F. R.
OFFICE: RPD
SUBOFFICE: RPD-30
REPORT NUMBER: DOT/FRA/ORD-77/45.II
KEYWORDS: Rail transportation, Warning systems, Electric relays, Solid state devices, Control equipment, Cost estimates, Circuits, Reliability, Maintainability, Railroad highway crossings
ABSTRACT: Consideration is given to the properties of solid-state circuits, miniature relays and large gravity-operated relays when applied to control systems for grade crossings equipped with train-activated motorist warnings. Factors discussed include original cost and service-life cost, vulnerability to environment, reliability and fail-safety, power requirements, maintainability, complexity of tasks to be performed and economic scale.

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