Flashing light signals and gates with traffic islands and fences improve safety for heavy street traffic at important crossing near Portland, Me. terminal passenger station; street traffic is channeled; gates operated by d-c from 8 cells of 200-amp-hr Exide battery.
Portland terminal solves crossing protection problem
Ry Signaling Communications
Railway Engineering and Maintenance ; 44 , n 10
1951
3 pages
Article (Journal)
English
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