More equipment placed in service during 1925 than in any year since 1914; statistical data on automatic signaling completed in 1925 and contemplated for 1926.
An active year in interlocking and signal construction
Ry. Age
Railway Age ; 80 , n 1
1926
8 pages
3 Figs.
Aufsatz (Zeitschrift)
Englisch
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Signal and interlocking construction
Engineering Index Backfile | 1925
|Electronic railway-signal interlocking
Engineering Index Backfile | 1960
New interlocking construction ideas
Engineering Index Backfile | 1924
|Interlocking construction and specifications
Engineering Index Backfile | 1902
|