Anonymous
Anonymous asked in Cars & TransportationRail · 2 months ago

What happens if a train passes a red signal?

if a train passed a red signal, is it like cars where nothing happens or does it activate some emergency stop on board? What if the train passed the red signal at high speeds, would it be able to stop it before it hits the train in front?

12 Answers

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  • 1 month ago

    in the US you will get a lot of angry passangers yet the MTA would keep their head up their ars3

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  • 1 month ago

    In the UK the brakes will come on.

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  • 2 months ago

    All hell breaks loose. Most train accidents are caused by human error. 

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  • 2 months ago

    Some rail lines (at least ones used by Amtrak) are equipped with "positive train control" or a similar system that stops the train if it passes a red signal.  Otherwise, nothing will happen, other than an accident, possibly.

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  • 2 months ago

    Dead passengers.

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  • al
    Lv 5
    2 months ago

    A red permissive signal means stop and proceed. After stopping (which is no longer required on some railroads) the train can proceed at restricted speed until a more favorable signal is reached. ... But a red absolute signal means stop - and stay stopped.

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  • 2 months ago

    Could be a major "oops".  Collision is certainly possible without external train control.

    Source(s): A dozen years ago in north Los Angeles area, an engineer was texting and ran through a red signal. Hit a freight train, he and 24 passengers died, others badly injured. https://en.wikipedia.org/wiki/2008_Chatsworth_trai...
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  • 2 months ago

    Until recently, trains would keep going until a human stopped them -- or they crashed. Recently, railroads have begun implementing "positive train control", which stops a train if it passes a red signal.

    • Incorrect. The alerter or “dead man’s switch” will stop a train of their is no input from the crew, trains have had them for sometime Also PTC will not stop a train from running an intermediate signal and hitting the back of another train if they are traveling below 20mph. 

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  • Anonymous
    2 months ago

    It will be a bad day for everyone concerned.

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  • 2 months ago

    That depends on where you are. In this country, some trains are fitted with a protection system what will stop them, others are not yet and the track equipment is not universal. (Underground trains, and some other electric trains where there are many tunnels, are stopped by a mechanical trip if the signal is at danger.  It cuts the traction current and causes an alarm in the cab, where the driver has to apply the brakes.)  

    In any case, there is an alarm which sounds some distance before the signal, advising the driver if it is at green or not,  so he gets early warning and can slow and prepare to stop if need be.

    That all may have changed lately.

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