Extensive traffic control system links three coal mines in concentration scheme with 20 mi of track; coal is transported to winding shaft in two ton capacity mine cars, in sets of 24, hauled by battery locomotives; driver operated system has color light signals interlocked with each other and with track points over which trains pass.
Traffic control at Hawthorn combined mine
Colliery Eng
Colliery Engineering ; 37 , n 440
1960
14 pages
Article (Journal)
English
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