Gwe Strange Signal...

Discussion in 'PlayStation Discussion' started by paulc, Apr 14, 2021.

  1. paulc

    paulc Well-Known Member

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    About 2/3 the way to Acton Yd from Reading on the Up slow line, there is a signal with another signal to its bottom right, top is green, bottom is yellow, what's this signal for?
     
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  2. byeo

    byeo Well-Known Member

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    Hmm, it's not a shunt signal is it..?
     
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  3. saltychipz#3569

    saltychipz#3569 Well-Known Member

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    Could you upload a photo of the signal please ?
     
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  4. paulc

    paulc Well-Known Member

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    Don't think so, not the usual triangle 3 light shunt signal setup.

    I'm going to have to aren't I :D I'll have a drive of the route this eve & hopefully I'll get s pic.
     
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  5. Olaf the Snowman

    Olaf the Snowman Well-Known Member

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    It’s a splitting distant signal just East of West Drayton. It gives an advance indication for SN310 junction signal which protects Stockley Bridge junction. At this junction, you are able to stay on the up relief or go across to the up main; the splitting distant signal gives prior indication as to where you will be going. Usually flashing yellows or PRIs are used for prior indication of route but in certain locations splitting distant signals are used.

    (Just for completeness, you can also get routed to the Up goods loop)

    The way splitting distant works is that there are 2 heads. The main head is for the main route which is continuing on the Up Relief. The side head is for the diverging route (across to the Up Main). Essentially, whichever is showing the least restrictive aspect is the route you will be taking. These are the different indications you can get and what it means:

    1. Main head: Green/Double yellow. Side head: Yellow. Route at SN310: staying on Up Relief
    2. Main head: Yellow. Side head: Green/Double yellow. Route at SN310: will be routed to the Up Main so reduce speed to 70mph
    3. Main head: Yellow. Side head: Unlit. Route at SN310: Signal is at danger

    10871F07-BBAD-4A7D-AF29-9B2DBBF05235.jpeg

    SN312 splitting distant signal:
    A743340D-6F01-4DD7-BD4F-275CFF5B6400.jpeg

    ... which is associated with SN310 signal protecting Stockley Bridge junction
    2BA5509F-B9E1-43E7-8F52-04345E818CB9.jpeg
     
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  6. paulc

    paulc Well-Known Member

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    Thanks for the detailed explanation Olaf :D
     
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  7. Cramnor

    Cramnor Well-Known Member

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    I had the same question, thanks for this great and detailed explanation!
     
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