Authors: F. Ross Holmstrom

Date of Publication:  December 1977

Sponsoring Agency:  U.S. Dept. of Transportation - Federal Railroad Administration, Office of Research and Development

Performing Organization: University of Lowell Research Foundation

Report No: FRA/ORD-77/45.II

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.
 

No. of Pages:  49