Photograph 10/6/58, by Dr. J W F Scrimgeour
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THE SIGNAL BOX |
OVERSEAS |
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Photograph 10/6/58, by Dr. J W F Scrimgeour |
A view of the interior of Tower 12 on the elevated lines of the Chicago Transit Authority. A six-handle Union Switch & Signal Co. interlocking machine, installed in 1902, controls the entire layout at this busy, but simple junction.
There is no block working on the Chicago elevated lines - all trains run
in the same direction on the double-track lines and trains stop on sight of the
train ahead. Signals are in use only at junctions.
 Photograph 10/6/58, by Dr. J W F Scrimgeour |
This picture was taken through the window of Tower 12, and shows two trains approaching the junction.
The train on the left is a Chicago, North Shore & Milwaukee service which will turn off to the left of the picture to reach its Roosevelt Road terminal. The right-hand train is a CTA service working (anti-clockwise) on the Loop service.
Additional notes by Kendrick Bisset
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Comments about this article should be addressed to John Hinson |