class411
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Post by class411 on Dec 19, 2023 11:24:33 GMT
Apologies if this has been asked before, but it's not an easy thing to search.
What is the allowed margin of error when an S Stock train stops in a station?
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Chris M
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Post by Chris M on Dec 19, 2023 11:35:10 GMT
±0.5m and ±0.7m are what I've seen quoted elsewhere.  |
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class411
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Post by class411 on Dec 19, 2023 11:41:28 GMT
Thanks, Chris.
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Post by t697 on Dec 20, 2023 16:32:54 GMT
The tolerance is generally bigger than Chris' source suggests. Some platforms have tighter tolerances than others. This was provided with the 'Interim' CSDE system and is perpetuated to an extent with the ATC.
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class411
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Post by class411 on Dec 21, 2023 3:13:31 GMT
So this stock is incompatible with platform doors?
Or can that be solved by a software alteration and better positional feedback?
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Chris M
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Post by Chris M on Dec 21, 2023 10:26:20 GMT
It will depend on how much tolerance the PEDs have.
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Post by t697 on Dec 21, 2023 19:33:17 GMT
If PEDs were to be added to any S stock platforms, the ATC stopping window could/would be amended to be compatible. The tolerance at Jubilee PED platforms is tighter than at the other Jubilee platforms as evidence of previous practice.
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class411
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Post by class411 on Dec 22, 2023 9:59:48 GMT
It will depend on how much tolerance the PEDs have. Looking at the quoted figure, there could be a difference of 1.4m between two different arrivals. I doubt the PED's would have that much latitude. I did see a very significant train/PED mismatch in Europe once. It was a very odd thing to see. |
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Post by t697 on Dec 22, 2023 18:44:12 GMT
PED throughway is generally made wider that the train door throughway obviously, to allow for a stopping tolerance. An affordable compromise has to be determined. On the Jubilee line the tolerance is +/-0.5m and at the extreme of that the throughway is just beginning to be obstructed. There doesn't seem to be a reason why the same couldn't be done with S stock if PEDs were introduced, although I don't foresee the SSR routes getting PEDs any time soon.
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