Track-Side Indicators

Discussion in 'Right of Way' started by Karl, Jun 7, 2013.

  1. Karl

    Karl 2008 Engineer of the Year Supporter

    Paul Bender's query about Take Siding Indicators prompted these remarks. I don't think that I anwsered his question, but it was interesting looking into the topic.

    I hope that someone might be able to provide addition info or photos for the TSI's as well as the numerous trackside indicators that the Frisco employed.

    Thanks to Jeff Cooney for his photos.

    Attached Files:

    SteveP likes this.
  2. pbender

    pbender Member Supporter

  3. yardmaster

    yardmaster Administrator Staff Member Administrator Supporter

    Karl and Jeff-
    Just stumbled across this - I think I overlooked it when we were out of town in June. The summary is superb, and the picturees and diagrams are quite helpful. Thanks very much for an interesting and helpful operational document.

    Karl, you'd mentioned these block indicators going back to the early 20th century. Do either one of you know when the US&SCo indicators would have been contemporary? I think they'd make an interesting detail to go on top of a relay box, but I wonder if these particular models would have been post-war?

    Best Regards,
  4. William Jackson

    William Jackson Bill Jackson

    Nice thread, I have a couple of these off other rail lines. One with the Semaphore and one with circles that looked close to the same. They are a neat detail.
    Bill Jackson
  5. April

    April Member

    In the mid/late 1970's I recall there were two small white lights attached to the side of the concrete relay box at the Vinita, Oklahoma interlocker. They normally stayed lit and whenever they went dark I knew a train was not far away.

  6. slsfrr (Jerome Lutzenberger RIP 9/1/2018)

    slsfrr (Jerome Lutzenberger RIP 9/1/2018) Engineer Staff Member Supporter


    I believe the signal indicator you have red checked (at north end of Fontana) is a signal for the spring switch. If you look (assuming train is going north) to the east you see the letters ss which means spring switch. All the spring switches, that I am/was familiar with, had a pot signal on the ground that indicated how the switch was lined. I am not familiar with Fontana, but in CTC some of the sidings would have a power switch on one end and a spring switch on the other. That way (Fontana) the dispatcher could line the north bound into the siding with out the train stopping to line switches.

    Take siding indicators were also used in none block territory. There was one at the west end of the siding at Cyril, Oklahoma, for east bound trains to take the siding. It was controlled by the operator at Cyril on the dispatchers authority. I never saw it illuminated or used.

    Paul, electric locks are called, well, 'electric locks' not 'electronic' locks. I found the edition of the rules you posted interesting in the fact that they called 'Stop', 'Stop and Wait'. How times change!

  7. pbender

    pbender Member Supporter

    Thanks. I fixed that.


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