Whole underground system when complete will be 55 route-miles in length; existing central loop of elevated lines 2-mi double track section is at present severely congested; due to many Junctions where speeds are restricted to 6-7 mph present loop service time is 17 min; power provided by 600-v d-c feed to third rail; it is connected with feeder cables every 1000 ft; map of system now in course of construction is given.
Chicago underground railway
Ry Gaz
Railway Gazette and Railway News ; 81 , n 13
1944
2 pages
Article (Journal)
English
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