New York Central makes this change between Buffalo, N. Y., and Cleveland, Ohio.
Light signals replacing semaphores
Ry. Signaling
Railway Signaling ; 18 , n 11
1925
3 pages
12 Figs.
Article (Journal)
English
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Replacing semaphores with position-light signals on Norfolk and Western
Engineering Index Backfile | 1936
G.N. Replaces Semaphores With color-light signals
Engineering Index Backfile | 1928
Boston and Maine replaces semaphores with light signals
Engineering Index Backfile | 1942
Semaphores replaced by color-light signals on 55 miles of I. C.
Engineering Index Backfile | 1926
|Frisco installs semaphores with color-light indication
Engineering Index Backfile | 1929