Strong competition which railways have to meet from motor transport has compelled railway authorities to direct more and more attention to measures which, while reducing operating costs, do not in any way neglect demand for safety; factor in these efforts to bring down operating costs while maintaining safety is provided by centralized traffic control developed by L. M. Ericssons Signalaktiebolag and known as CTL system.
Centralised traffic control
Ericsson Rev
Ericsson Review ; n 2
1936
4 pages
Article (Journal)
English
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