Manual of recommended practice for railway engineering and maintenance of way (1905)
American Railway Engineering and Maintenance-of-Way Association · Chicago, Ill. : The Association · leaf 96
SIGNALING AND INTERLOCKING. 79 LAZY JACK COMPENSATOR. … uu AhK 80 SIGNALING AND INTERLOCKING. (6) That red be the color stop indication, and that the hori-zontal position of the arm be the position stop indication for all homesignals. (7) That a mark of distinction be made between automatic blocksignals, and all other home signals, whether interlocking,…
Railroad engineering · Railroads
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