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Post by Deleted on Aug 7, 2011 13:57:43 GMT
Whatever happened to the platform stop buttons on the Jubilee Line, now that ATO is on-line? They seem to be taped up now.
It seems a bit risky sealing up the emergency buttons on the Jubilee platforms - I think they should have gone the same way as the Victoria, Central and DLR systems, where the platform stop buttons are always ready for use.
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Post by br7mt on Aug 7, 2011 17:58:50 GMT
Descoped so aren't even connected to the system. Should be removed soon.
Regards,
Dan
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Post by jardine01 on Aug 9, 2011 18:36:20 GMT
In an emergency how would the train stop in ATO mode does the driver just put the handle out and brake or presses a stop button?
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Post by Deleted on Aug 9, 2011 22:46:40 GMT
The driver has 2 options for all I know. One is to un-stow the CTBC and the emergencies will apply, or you could just press the 'mushroom' as in the massive sticky out red button which applies the emergencies.
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Post by Deleted on Sept 20, 2011 12:37:02 GMT
In an emergency how would the train stop in ATO mode does the driver just put the handle out and brake or presses a stop button? I was under the belief that they weren't being removed (as it would cost too much). |
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Post by Tubeboy on Sept 20, 2011 17:09:02 GMT
I have been told, the plungers were being mothballed, not removed.
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Post by jamesb on Sept 25, 2011 9:54:01 GMT
I'm a bit confused about the stop plungers.
Aren't they part of the new signalling system and just yet to be commissioned?
Why were they installed in the first place (were they always there since the Jubilee line was opened?)
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Post by Deleted on Sept 25, 2011 22:24:15 GMT
They WERE part of the new signalling system but because Tube Lines ran out of money they were going to be too expensive to completely install and too expensive to maintain.
They were installed in the first place as part of the agreement when Tube Lines won the contract to upgrade the Jubilee Line.
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Post by jamesb on Sept 26, 2011 6:20:57 GMT
I'm surprised that platform stop buttons are not viewed as safety critical equipment?
Isn't this an example of cost cutting directly impacting on safety?
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Post by Deleted on Sept 26, 2011 6:33:43 GMT
^^ +1
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Post by Deleted on Sept 26, 2011 17:10:11 GMT
As LU still have drivers at the front of the train, how does the removal of the plungers increase the risk against conventionally signalled lines? Prior to TBTC you relied upon the driver to spot any obstruction and you continue to rely on the driver to spot an obstruction under TBTC. The ability to stop the train in an emergency from the platform using an emergency stop plunger, is a useful one but not a feature with conventional signalling. The question being, is it worth spending many millions creating an EXTRA safety feature against spending the money elsewhere improving safety or accessibility?
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Post by Deleted on Sept 30, 2011 21:24:43 GMT
They WERE part of the new signalling system but because Tube Lines ran out of money they were going to be too expensive to completely install and too expensive to maintain. They were installed in the first place as part of the agreement when Tube Lines won the contract to upgrade the Jubilee Line. As usual, incorrect rumours and statements about Tube Lines. The plungers were fully installed, circuitry and software fully installed, but as I understand it LU decided they didn't want them enabled as they cause nothing but trouble from false activations and delays with kids, pranksters and stupid people pressing them for fun. The system is running with 'overrides' in to prevent the circuitry which is fully wired up from causing any unnecesary failures. |
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Post by jamesb on Sept 30, 2011 22:22:37 GMT
As LU still have drivers at the front of the train, how does the removal of the plungers increase the risk against conventionally signalled lines? Prior to TBTC you relied upon the driver to spot any obstruction and you continue to rely on the driver to spot an obstruction under TBTC. The ability to stop the train in an emergency from the platform using an emergency stop plunger, is a useful one but not a feature with conventional signalling. The question being, is it worth spending many millions creating an EXTRA safety feature against spending the money elsewhere improving safety or accessibility? Well, it doesn't increase risk by not having them, but may prevent risk being reduced? And it is already installed, just not switched on? Also, isn't there a theoretical risk that the driver on an ATO controlled train wouldn't be looking at the track ahead since they aren't physically controlling the train with their hand? (For the non-PED stations anyway) |
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