Electric interlocking installed at Sapulpa, Okla, and automatic block signaling extended on 45 mi of single track from Sapulpa southward to Henryetta on route to Sherman, Tex.
St. Louis-San Francisco installs interlocking and automatic block
Ry Signaling
Railway Signaling ; 34 , n 2
1941
5 pages
Article (Journal)
English
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