Describes a perfected signal system with timing relays in underground lines in New York by means of which express trains on same track are allowed to approach more closely to each other at station stops; this has decreased train headway.
Speed control in interborough subway
Elec. Ry. Jl
Electric Railway Journal ; 66 , n 2
1925
4 pages
11 Figs.
Aufsatz (Zeitschrift)
Englisch
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The New York interborough subway system
Engineering Index Backfile | 1927
|The signal system of the interborough subway
Engineering Index Backfile | 1908
Speed control signals on the interborough
Engineering Index Backfile | 1910
Engineering Index Backfile | 1922