Sd40-2 Csx In Cab Signals

Discussion in 'General Discussion' started by ravensview, Oct 11, 2023.

  1. ravensview

    ravensview New Member

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    Top centre, there is a panel with 5 sets of lights, three or two lights in each set, at various angles. What does each position specifically signify? I've found a general description in the NY-NH manual and elsewhere, but no specific description of each set.
    For example, what does this image mean?
    sd40-2.png
     
  2. triznya.andras

    triznya.andras Well-Known Member

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    I don't precisely know, given I hardly drove it (yet), but I drove the NEC a lot so let me try.
    It's based on Pennsylvania Railroad position light signaling. That's 100% sure so check wikipedia.
    NY-Philly has it, NY-NH only on the Hell Gate line (Penn to New Rochelle). The NJCL also includes the NY-Trenton section.

    Silly me just figured Wikipedia and attached the NY-Philly manual after typing it all. So just leaving it here.
    I wrote "is" but you can consider it "should be".

    0 = none is stop (danger).

    1 steady is clear at track speed.
    1 flashing is clear, maximum permitted speed is 60. Usually in junctions, sometimes for curves, or check-down for a 45.

    2 solo is, I assume, invalid. It should be 4 solo as on your pic.
    2 + flashing 3 means "warning of diverging at 45".
    2 + steady 3 means "warning of diverging at 30".
    2 + flashing 4 is probably invalid.
    2 + steady 4 is an edge case, many zones use double yellow as "warning of diverging at 30".
    2 + flashing 5 is "warning of diverging at 20".
    2 + steady 5 is "warning of diverging at 15".

    3 flashing is "diverging at 45". You'd have a red above it.
    3 steady is "diverging at 30". You'd have a red above it.

    4 flashing is "advance warning, slow to 45".
    4 steady is "warning, slow to 30". Next signal is 0 or 5.

    5 flashing is "restricted to 20".
    5 steady is "restricted to 15".
     

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  3. ravensview

    ravensview New Member

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    Thanks, your list is just what I was looking for. I'd already found those guides for external signals, but nothing for internal cab ones.
     

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