Double Yellow Aspect

Discussion in 'TSW Troubleshooting & Issues Discussion' started by graham.allwood, Oct 13, 2025.

  1. graham.allwood

    graham.allwood New Member

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    Hi, I have a general driving question!!

    I was on the ECML with a speed limit of 125. I passed many green signals. Then I passed a double yellow. Should I apply max / emergency break just in case the next signal is red?

    Thanks

    Graham
     
  2. BBIAJ

    BBIAJ Well-Known Member

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    Double yellow is seen as a preliminary caution, so start to reduce speed, as the next signal will be a single yellow, signifying a red ahead.
     
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  3. OldVern

    OldVern Well-Known Member

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    Technically yes, but there is an issue with the level crossing timers on ECML which DTG never fixed, which results in getting a double yellow when the next signal then shows green (as the barriers are down then). Of course, driving to real world principles you should never assume that as you might be catching up a Class 158 or freight, so as a precaution I normally take off power and at least kick in a minimum brake application.
     
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  4. March Hare

    March Hare Well-Known Member

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    Out of interest, when encountering the double yellow, what speed should you aim to get down to; likewise for single yellows.
     
  5. Midnight

    Midnight Well-Known Member

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    I usually aim for 60mph on a double-yellow, and under 30mph for a single yellow.
     
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  6. Jetset-James

    Jetset-James Well-Known Member

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    DTG never fixing a bug? Whoever would’ve thought that would still be a thing. I really do think there ought be a close look at the shabby attitude and lack of commitment to any form of quality control.
     
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  7. graham.allwood

    graham.allwood New Member

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    Ah, I assumed it could be red after a double yellow.
     
  8. Midnight

    Midnight Well-Known Member

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    Nothing is out of the realms of possibility, though it's almost unheard of for that to happen outside of dire emergencies, like a derailment or something.

    You may find this useful:

    https://igg.org.uk/rail/3-sigs/powersig.htm
     
  9. redrev1917

    redrev1917 Well-Known Member

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    I find lifting off the throttle as soon as the double yellow comes into view usually allows it enough time to clear back to green before I pass it so I can resume line speed again. It’s probably not prototypical and bad driving technique but for me it’s the lesser evil and loses me the least time.
     
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  10. samuelpower2001

    samuelpower2001 Well-Known Member

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    Especially to not get tpws trip you
     
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  11. aeronautic237

    aeronautic237 Well-Known Member

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    I like to pass single yellows at about 60mph if I'm driving at more than 80 miles per hour. Maximum brake might be a little overkill. I don't tend to exceed 50% on the Azumas.

    The issues with the level crossings are about to get a little more interesting with the new random signal delays, though!
     
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  12. Double Yellow

    Double Yellow Well-Known Member

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    HOW DARE YOU USE MY NAME IN VAIN!
    upload_2025-10-14_14-39-54.gif

    When I saw this post, I thought this was a call out post ;)

    A double yellow aspect is warning you to slow down at the next signal, as it will mostly likely be a single yellow, then Red.
     
    Last edited: Oct 15, 2025 at 12:38 PM
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  13. BBIAJ

    BBIAJ Well-Known Member

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    Next but one likely to be red.
     
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  14. jack#9468

    jack#9468 Well-Known Member

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    Guess you could say you were summoned.

    You're not a demon by any chance?
     
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  15. aeronautic237

    aeronautic237 Well-Known Member

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    If anyone out there's feeling a little lonely and wants just a little attention...


    Change your name to 'bug'. Everyone'll be flocking to make threads just for you!
    upload_2025-10-14_18-17-29.png
     
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  16. dr1980

    dr1980 Active Member

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    If you’re more familiar with North American signals, think of it as a flashing yellow, advanced clear to stop in Canadian terms.
     
  17. Double Yellow

    Double Yellow Well-Known Member

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    Only on Halloween :)
    upload_2025-10-15_12-39-35.gif
     
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