Automatic electric gates supplemented by flashing light signals, for 20 crossings on Chicago North Shore and Milwaukee; elimination of gatemen cuts operating expenses and aids in defraying cost of new equipment; data on control and layout arrangements.
Automatic gates increase safety
Ry Signaling Communications
Railway Signaling and Communications ; 47 , n 8
1954
Aufsatz (Zeitschrift)
Englisch
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