At the end of each carriage, there are doors that can be opened by pressing a button and waiting for 2 seconds. The picture showing how to use these doors are here:

Photo of door access

The doors are generally stiff and akward to open. However the bit I'm confusd about is the picture that flashes above the doors:

Gif of the picture

It's a no entry sign. It doesn't seem to bare any issues though, as both doors work and can be operated (After the 2 second delay). This random sign just flashes away and doesn't seem to indicate anything. Does anyone know why it's there and what it signifies in this context?

A side note, you have to go through these doors to access the public toilets. These doors are in every carriage, but a toilet could be up to 4 carriages down the train. It seems strange they'd have a no entry sign, yet they'd be asking you to go through the doors to get to the toilet

  • Does the sign flash all the time or does it go off when the door opens?
    – mdewey
    Commented Oct 24, 2017 at 13:10
  • I believe it's constantly flashing, but would need to double check on my next transit. I remember two ladies pressing the button and even with the sign showing, they could open the door
    – Draken
    Commented Oct 24, 2017 at 13:13
  • Maybe it's analogous to the seat belt sign on an airplane? It advises you that it's not safe to pass through the door at this time, not even to go to the toilet, but it won't physically prevent you if you insist. Commented Oct 24, 2017 at 14:15
  • @NateEldredge Then it should turn off at some point during the journey, but it doesn't. It's flashing during the entire trip and was the same on all the doors I passed on my way to the toilet
    – Draken
    Commented Oct 24, 2017 at 14:17
  • 2
    I notice in your gif that the sign is flashing. Clearly this is some kind of an adventure movie type scenario where you have to jump through right as the no entry sign disappears. (probably a joke) Commented Oct 26, 2017 at 14:25

2 Answers 2


The illuminated flashing no entry sign usually shows on the 'le shuttle' to indicate that you need to be aware when using them, in particular when the shutters are moving


Or if the motorised split doors are going to move.


If you look at the floor in the YouTube videos you will see a marked caution area.

i have not travelled on this train in a while, but seem to remember that whilst the train is in normal motion that the red sign flashes once you push the button for the two seconds whilst the door unlocks, and then the opposite light flashes green for a short moment to indicate that you can plus the doors open

  • I've ridden the train again and this time the flashing no entry sign was only on one door out of the available 4. It looks like it was a system glitch causing the last set to constantly flash
    – Draken
    Commented Feb 13, 2018 at 9:02

This scenario is not at all uncommon. You will see No Entry/Prohibition signs on many types of trains, including commuter, subway, regional, etc. Yet, the doors are fully functional and easy to operate.

In these cases, the train operator would really prefer you not cross between cars/carriages, especially when the trail is moving, but the doors must remain accessible for evacuation purposes.

  • 4
    And the fact the toilets are in another carrigage, often 3 or 4 carraiges down? There are signs pointing people to go through these doors several times to access toilets, stairs to the other floor, etc.
    – Draken
    Commented Oct 23, 2017 at 13:40
  • 6
    Then why use a no entry sign, which signifies no one should enter without authorisation? There are far better signs that signify danger or other similar things like an exclamation mark in a yellow triangle. A no entry sign and then another sign asking people to go that way to get to the toilets are conflicting signs
    – Draken
    Commented Oct 23, 2017 at 13:48
  • 1
    @Muzer It showed on all doors that I had to wander through to get to the toilet. There are 4 of these doors per carriage, two at either end, and all of them had one sign flashing showing no entry (Both sections of the door still worked as well). I've also seen this on my previous crossing. I doubt it's a fault
    – Draken
    Commented Oct 23, 2017 at 13:56
  • 1
    If you want to comment on your answer, like "hey, why are you downvoting" then comment to that effect. Meta talk doesn't belong in your answer. Commented Oct 25, 2017 at 1:52
  • 2
    "Downvotes without comment are completely wrong and misleading." This answer has five downvotes, The second comment by Draken has five upvotes. I'm willing to guess that most of the people who downvoted (like me) didn't feel the need to post a comment when there are existing comments have already justified the downvote.
    – Ambo100
    Commented Oct 25, 2017 at 17:52

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