Operating characteristics of different types to be studied.
Southern Pacific installs semaphores and light signals on new line
Ry. Signaling
Railway Signaling ; 19 , n 12
1926
3 pages
12 Figs.
Article (Journal)
English
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Frisco installs semaphores with color-light indication
Engineering Index Backfile | 1929
Light signals replacing semaphores
Engineering Index Backfile | 1925
G.N. Replaces Semaphores With color-light signals
Engineering Index Backfile | 1928
Southern Pacific installs C.T.C.
Engineering Index Backfile | 1947
Boston and Maine replaces semaphores with light signals
Engineering Index Backfile | 1942