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"The Railroad Signal"
(1948) NYC
A New York Central Railroad Educational Documentary from 1948 that gives an overview of railroad signals and related safe working infrastructure used by trains, as well as the ongoing improvements to the signalling systems due to technological advances. The film was released as part of the NYC's "Running the Railroad" series, and features many examples of different signalling systems in use by the New York Central Railroad, as well as many scenes of passenger and freight trains.

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The Railroad Signal screenshot
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