Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Oct 25, 2010 3:31:40 GMT
PEDs work fine in Hong Kong, where they have frequent use, curved platforms, etc etc etc. However, they also aircon their stations, which is costly if there are no PEDs.
Yes, Ben, that would indeed have been prudent. Try it first. I think you have a very valid point there.
[off topic] Alex, Singapore is an Alphabet Soup Republic (ASR). Everything is abbreviated if possible. Want some examples? I can PM them. [/off topic]
|
|
|
|
Post by tubeprune on Oct 25, 2010 6:22:08 GMT
The sensitive edge idea was tried on a C Stock car. It seemed to work OK. There are some mods being considered/tried on the 09TS system to remove some of the more irritating issues.
Now, if you consider the costs/benefits of such safety systems, you might have trouble getting a sensible answer. If you consider the number of door close operations per year, you get an awfully big number. If you look at the 3 incidents which have had a serious result in the last 30 years, you get a very small ratio. Without doing the maths, I'm not sure it's worth it.
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Oct 25, 2010 6:45:23 GMT
It may well save lives, so that would make it worth it.
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Oct 25, 2010 12:25:36 GMT
Without doing the maths, I'm not sure it's worth it. If it saves only one or two lives over the life of the fleet, no, it's not. If it saves many more than that its money well spent. |
|
|
|
Post by singaporesam on Oct 26, 2010 13:38:10 GMT
DFT has official figures for a life its 1.57 million pounds in 2007 money . Traditionally a factor of 10 is applied to the reasonably practicable judgement although RSSB is now questioning this , so in simple big numbers three fatalities x 1.57 x 10 means the mitigating measure has to cost less than 50 million to be worth it.
|
|
Colin
Advisor
My preserved fire engine!
Posts: 11,317
|
Post by Colin on Oct 26, 2010 13:44:10 GMT
In which case you've probably just argued yourself away from PEDs and onto the cheaper sensitive edge doors/inter car barriers.....
|
|
|
|
Post by singaporesam on Oct 26, 2010 23:39:10 GMT
Which brings us back to the question of if it works and whether the false activations will cry wolf one too many times.
|
|
Chris M
Global Moderator
Forum Quizmaster
Always happy to receive quiz ideas and pictures by email or PM
Posts: 19,441
|
Post by Chris M on Oct 27, 2010 0:38:08 GMT
And so I shall refer you back to the earlier postings in this thread where it is explained (very clearly if my memory serves me correctly) that this is a new technology that is still being tested to determine the optimum settings.
For reasons that I hope are blindingly obvious, it is far better for the edges to be over-sensitive than under-sensitive, and so the initial settings are probably erring singificantly on the safe saide. At least, that's how I would do it.
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Oct 27, 2010 3:42:50 GMT
And so I shall refer you back to the earlier postings in this thread where it is explained (very clearly if my memory serves me correctly) that this is a new technology that is still being tested to determine the optimum settings. For reasons that I hope are blindingly obvious, it is far better for the edges to be over-sensitive than under-sensitive, and so the initial settings are probably erring singificantly on the safe saide. At least, that's how I would do it. To a point. If they remain hypersensitive, they will be a disruption. If they are made to work perfectly and prevent loss of life, then I will fully support them. I still think there are better ways, but I suppose this'll do... |
|
Phil
In memoriam
RIP 23-Oct-2018
Posts: 9,473
|
Post by Phil on Oct 27, 2010 7:25:38 GMT
The sensitive edge idea was tried on a C Stock car. It seemed to work OK. There are some mods being considered/tried on the 09TS system to remove some of the more irritating issues. Now, if you consider the costs/benefits of such safety systems, you might have trouble getting a sensible answer. If you consider the number of door close operations per year, you get an awfully big number. If you look at the 3 incidents which have had a serious result in the last 30 years, you get a very small ratio. Without doing the maths, I'm not sure it's worth it. prjb, that venerable S stock project manager, said they made a very detailed study of the pros and cons and the incidental cost (i.e. adding sensitive edges to an already existing design) of the edges was surprisingly low - so much so that the cost was considered a no-brainer! What DID worry them was the peripheral costs of train delays at stations, more trains being taken OOS just for the doors etc.etc., but prjb still feels that they will not (as now implemented) be intrusive on train operation: electronics since the C stock are now in another universe. |
|
