At Delray, Mich, railroad crossings and junctions involve tracks of New York Central, Michigan Central, Wabash and Pere Marquette; interlocking maintained by Pere Marquette; mechanical interlocking was replaced with electrochemical plants, including new electrochemical machine in new tower; restrictions in use of new insulated wires and cables led to use of mechanical levers for switches and crossovers with electric levers for signals.
War-time replacement of interlocking on Pere Marquette
Ry Signaling
Railway Signaling ; 39 , n 5
1946
Article (Journal)
English
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New interlocking on pere Marquette
Engineering Index Backfile | 1946
All-relay drawbridge interlocking installed on pere Marquette
Engineering Index Backfile | 1946
Pere Marquette installs C.T.C.
Engineering Index Backfile | 1947
Pere Marquette shows improvement
Engineering Index Backfile | 1929
Pere Marquette installs C.T.C.
Engineering Index Backfile | 1946