CTC i Nordamerika
Union Switch & Signal Co. Bulletin 148 CTC, ca 1931 Allmän beskrivning General description of Union CTC Exempel på CTC-installationer Installations
Material från Väg- och vattenbyggnadsstyrelsens arkiv, Riksarkivet
Union Switch & Signal, inkommet via AEG 1952
Följebrev från AEG, annonser, artikel från lokpersonalförbundets tidskrift 1947
CTC "West of the Pecos" on the Santa Fe [Railway Signaling 1945]
CTC has long sidings with signals on the Santa Fe [Railway Signaling 1947]
Southern Pacific installs CTC [Railway Signaling 1947]
Frisco's light-traffic CTC uses power switches and spring switches [Railway Age 1951]
Single track with CTC replaces double track on Milwaukee [Railway Signaling 1951]
625 miles of CTC in one stretch (UP) [Railway Signaling 1949]
Rock Island adapts signaling to traffic [Railway Age 1949]
CTC saves train time on Frisco [Railway Age 1949]
Signaling that no wind can harm (Seaboard) [Railway Age 1948]
A whole railroad of CTC (New York, Chicago & St Louis) [Railway Age 1949]
CTC increases capacity of single-track freight line handling heavy traffic (Chesapeake and Ohio) [Railway Signaling 1949]
CTC on single track permits removal of second main on 22.4 miles on Boston & Maine [Railway Signaling 1951]
Union Pacific installs CTC on 175 miles of single track (Daggett, Cal - Las Vegas, Nev) [Railway Signaling 1943]
Double to single track 60 miles on the Erie [Railway Signaling 1951]
Train dispatching on a complete operating sub-division with Union CTC US&S bulletin 154 1939
CTC
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