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The QNYLA has engine 8016 and a very short train. Interesting to see just one unit assigned to a high priority train.
With train QNYLA by, the dispatcher lines the switch and gives the train a signal to leave the siding.
Around 1925, 60 US&S color light signals were added from Defiance to Chambers, AZ on 38 miles of double track. Belen to West Defiance CTC was completed in 1984. Disk 66