Posted by G. M. Meints on 12/22/2009, 3:37 pm, in reply to "Re: PRR Gibson interlocking Kalamazoo"
To follow up on Ben's inquiry, both home signals on the main track were the standard position light signals. I don't remember what those on the running track were. The two NYC signals were, as I recall, dwarf signals displaying red or yellow.
One quirky thing about the Gibson Street interlocking is that during the hours the PRR block station was manned at the Kalamazoo depot, the operators controlled the signals. When closed, it was an automatic interlocking. Also, there was a remote control on a post near BO. It was on the south side of the Eastward main track, just east of the Grand Trunk diamond. It was a pushbutton that set the Gibson Street signals for "proceed" southbound on the NYC. This was put in because KE-1 usually headed south before 7 AM (when the Pennsy office opened) and allowed a KE-1 brakeman to set the signal so the 100-car train would not have to stop at Gibson Street.
Why didn't the Pennsy allow remote control by BO Tower? The Pennsy had a hang-up about allowing another road to have remote control of one of its crossing interlockings. As far as it was concerned the interlocking options were: manned by either road, Pennsy remote-controlled, or automatic.
Notice on the diagram that the target remained in use for the Grand Trunk diamond, with stop signs in only three directions.
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