Cincinnati, Indianapolis & Western Railroad

(Subsidiary of Baltimore & Ohio Railroad)

Signal Rules, August 1, 1917

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Interlocking and Automatic Block Signals


 Stop-Signal (501A)
Stop and proceed-signal (501AA)
Approach -signal (501B)
 Clear-signal (501C)
 Approach-restricting-signal (501E)
 Clear-restricting-signal (501F)
 Permissive-signal (501G)
 Stop and proceed-signal (502AA)
 Approach-signal (502B)
 Stop and proceed-signal (504AA)
 Approach-signal (504B)
 Clear-signal (504C)

Manual Block Signals


 Stop-signal (301A)
 Clear-signal (301C)
 Permissive-signal (301G)
 Stop-signal (302A)
 Clear-signal (302C)
 Permissive-signal (302G)

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