Block Signal Operation: A Practical Manual
William L. Derr
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Block Signal Operation: A Practical Manual

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This practical manual provides a thorough guide to the operation of block signals in railroad systems. The author covers relevant safety procedures and regulations, as well as technical considerations for the design and maintenance of block signal systems. This book is an essential resource for anyone working in the railroad industry or interested in the history and mechanics of railroading. This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work is in the "public domain in the United States of America, a...