Details of several methods, including installation on former Great Western Railway in use since 1906; in GWR system, metal ramp 40 to 60 ft long in middle of track is electrically connected to distant signal level and energized when signal is off; Hudd system installed on former London, Midland and Scottish Railway.
Automatic train control
Elec Rev
Electrical Review ; 144 , n 3712
1949
3 pages
Aufsatz (Zeitschrift)
Englisch
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