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Post by will on Jan 2, 2016 19:23:40 GMT
Can Victoria Line drivers select the doors to open before the train stops. The doors always open extremely quickly whereas on other lines it can take up to about 5 seconds after the train has stopped before the doors are opened.
This is shown in the video:
Thanks  <<rincew1nd: Thread title updated to accurately reflect the discussion>> |
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rincew1nd
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Post by rincew1nd on Jan 2, 2016 21:18:00 GMT
I would like to think this is because the Victoria Line is operated automatically and the train just does it, however perhaps it's because the train is driven automatically the Train Op is poised ready to open the doors, rather than having to worry about stopping it.
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Post by superteacher on Jan 2, 2016 21:37:36 GMT
I would like to think this is because the Victoria Line is operated automatically and the train just does it, however perhaps it's because the train is driven automatically the Train Op is poised ready to open the doors, rather than having to worry about stopping it. It doesn't seem to happen on any of the other ATO lines though. I've seen it happen on D stock too. |
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rincew1nd
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Post by rincew1nd on Jan 2, 2016 22:18:56 GMT
On D I assume it's the Train Op pushing the open buttons whilst the train stops. With brakes applied and no power, the doors will open once the sensor is inside the CSDE loop; won't they?
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Post by Deleted on Jan 2, 2016 22:50:08 GMT
I think the train needs to be going no faster than X MPH as well
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Post by Deleted on Jan 3, 2016 13:09:03 GMT
I have seen the doors open on the 73TS before while the train is still stopping so I imagine its due to keen T/Os
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Post by superteacher on Jan 3, 2016 13:19:26 GMT
Never seems to happen on 92, 95, 96 or S stock though.
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Post by will on Jan 3, 2016 13:52:27 GMT
Never seems to happen on 92, 95, 96 or S stock though. Agreed considering the 92,95 + 96 are ATO you would think that they would try to open them quicker if possible to reduce dwell time particularly with the Jubilee Line planning to run 36tph. Hopefully the S stock will improve as more and more drivers get used to them and eventually when they go ATO. |
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Post by punkman on Jan 3, 2016 14:32:45 GMT
On the Jubilee (and presumably Northern too as they're both Seltac systems) the T/Op has to wait for an "Accurate Stop" indication before doors can be operated with an inherent delay of a second or so; obviously more important for stations with platform edge doors. I have heard while the facility is there for the doors to open automtically once (accurately) stopped, it is not commissioned due to union unease, so I imagine the Victoria would be no different on that basis. Although as the OP states my experience with travelling on the Victoria is that doors do indeed open very promptly.
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rincew1nd
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Post by rincew1nd on Jan 3, 2016 15:14:24 GMT
If an S Stock doesn't stop bang on the mark, doors are cut out; I assume that there is some kind of "correctly berthed" communication that has to happen before the doors open. Could it be that the Vic Line simply uses CSDE as described here by District Dave? |
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Post by t697 on Jan 3, 2016 19:05:12 GMT
The Vic line 09TS CSDE is part of the ATC system. It certainly looks like they have optimised it well to eliminate delay at stopping. As mentioned, all part of the little bits that add up to achieving a reliable 36tph.
An object lesson for the SSR ATC then... Can Thales match it? Perhaps it's just as well the requirement is 32tph on the core SSR.
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Post by edwin on Jan 7, 2016 3:09:03 GMT
I've seen this happen on the 95TS a few times (mostly before it was ATO), but never on the 96TS or 92TS, despite them being ATO. In fact there is usually quite a delay.
Seen it happen on all of the older stock too.
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Colin
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Post by Colin on Jan 8, 2016 1:50:01 GMT
As alluded to above, on S stock we need to have the accurate stop indicator displayed in the cab before we can attempt to open the doors......and that dosen't appear until we have stopped hence the "delay" when opening the doors. On D stock, we can open the doors below 3 mph providing we're in the CSDE loop. Loops vary in length but there is generally a fairly generous margin to play with..........so that explains why we can open the doors as we're coming to a stop on D stock but not on S stock  |
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Post by Deleted on Jan 8, 2016 20:01:42 GMT
You have approx 1.75metre if you stop correctly in a D stock. The loops are a fixed size on legacy CSDE but very accurate on the newer version which we do not look after.
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rincew1nd
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Post by rincew1nd on Jan 8, 2016 20:21:51 GMT
You have approx 1.75metre if you stop correctly in a D stock. The loops are a fixed size on legacy CSDE but very accurate on the newer version which we do not look after. So would this...  (Photo courtesy DD)...still be typical of a current installation? |
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Post by Deleted on Jan 8, 2016 21:23:20 GMT
Thats the legacy CSDE correct
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Post by superteacher on Jan 9, 2016 10:28:55 GMT
So is the opening of doors before the train has come to a complete stop frowned upon from on high?
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Post by Dstock7080 on Jan 9, 2016 10:47:40 GMT
So is the opening of doors before the train has come to a complete stop frowned upon from on high? Certainly! If someone, disabled or otherwise, steps out of an open door while the train is still moving they could be injured in some way. |
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class411
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Post by class411 on Jan 9, 2016 11:00:06 GMT
So is the opening of doors before the train has come to a complete stop frowned upon from on high? Certainly! If someone, disabled or otherwise, steps out of an open door while the train is still moving they could be injured in some way. A blind person in an otherwise empty carriage (or where no one was observing), would be particularly vulnerable. Many years ago (~1980) I commuted from Canon Street on the District line. Most mornings there was a blind man waiting for the train. On many occasions he would make for the gap between the carriages. All the regular commuters were ready to go and let him know, if he did so. (I expect he would have realised before trying to step into the gap, but no one wanted to test the theory.) Now, of course, LU have tackled that problem. I often thing of that gentleman, though, when people complain about the safety elf going mad. |
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Post by superteacher on Jan 9, 2016 11:16:00 GMT
The doors on metro trains in Paris can be opened a good 2 - 3 metres before the train comes to a stop.
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Post by edwin on Jan 11, 2016 4:56:30 GMT
So is the opening of doors before the train has come to a complete stop frowned upon from on high? Certainly! If someone, disabled or otherwise, steps out of an open door while the train is still moving they could be injured in some way. True, but in the video in the OP of this thread the doors just stop as soon as the train stops, not when it is moving. I don't see how this can be bad when compared to the multiple second delay that occurs when a train stops on other lines. |
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