Nostalgia & History > Q Question: Signals

Does anyone know why some intermediate signals on the BNSF St. Joseph Sub (Ex-CB&Q) have N and S prefixes?
There is a signal in St. Joseph on Main 1 before French which has a S prefix for EB movement and a N prefix for WB movement. I am told no one out here knows what the letters stand for, and it looks like the CB&Q timetable I found has this originally as a East/West mainline, as it is today.
The Omaha Sub also has some odd prefixes on some of the intermediate signals too, but I just don't remember what they are.

Thank you for your time.
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DG .
Unknown, US



Edited 1 time(s). Last edit at 06/26/15 01:10 by trkspd.

Most likely N for North Track and S for South Track on an East-West railroad.

I thought something similar, but then why would it be a N Prefix on one side of the signal, then a S prefix on the other, for the same track.

Posted from Android

DG .
Unknown, US