Rapid transit trains on Milwaukee avenue subway running on 2 1/2 min headway are protected by automatic train stops and automatic block signaling; interlocking control machine is "UR" route type with line-of-light track layout.
Chicagos newest subway has automatic block signaling and train stop
Ry Signaling Communications
Railway Engineering and Maintenance ; 45 , n 3
1952
7 pages
Article (Journal)
English
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