Ben
fotopic... whats that?
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Post by Ben on Jul 13, 2009 16:19:01 GMT
Could a reinforced glass panel not be put in front of it, instead of the bars?
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mrfs42
71E25683904T 172E6538094T
Big Hair Day
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Post by mrfs42 on Jul 13, 2009 16:34:35 GMT
Nice thought, but there would need to be a lot of proving work put into checking that the glass panel wouldn't give false aspects by reflection - 'ghosting' or 'phantom' aspects.
I suspect [1] that this sort of modification might require the dread words 'type approval'.
[1] this is only supposition.
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Post by norbitonflyer on Jul 13, 2009 19:25:37 GMT
If the problem is the risk of falling off the bridge, why not extend the parapet upwards and eastwards? Having a ledge in front of a signal, even if it were not fenced, seems like a bad idea - something could be left on it (snow, a bird, general detritus - "oh, I'll just leave this here and come back to pick it up later")
Even a layman like me knows that's why, on NR, the red light is at the bottom
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Post by d7666 on Jul 13, 2009 19:27:13 GMT
Why not actually *use* reflection ? I suggest relocating the working signal itself - and use reflected light as the indication. Where the signal is now, place a ''dumb'' signal head made up of multi prisms of coloured glass (sort of like red reflector lights on cars). No moving parts, no electrical bits, just a post with 4 coloured prism clusters [1]. At track side at a safe [for T/O etc] working location have the actual signal that beams laser light at the prisms, all angled in such a way that correct sighting is obtained, and ensuring the beam can't be obstructed, and ensuring the prisms can't reflect other light sources (this ain't rocket science). Errr yesss ... type approval might also arise. I'll put this in as a staff suggestion [1] as an afterthought, just two prism clusters on a post and change the laser light beam colour for the various aspects R GY GG. -- Nick
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Ben
fotopic... whats that?
Posts: 4,282
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Post by Ben on Jul 13, 2009 19:30:38 GMT
Like a fiber optic bundle type thing?
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Post by happybunny on Jul 13, 2009 19:35:07 GMT
I am surprised how quickly the 'remedial' work to remove the wire cage in front of the aspects has been completed (although as shown in DStock's picture the bars still slightly obstruct the danger aspect). I think the prompt-ness of carrying this out echoes how ridiculous it is, that it was allowed to have happened at all in the first place (giving any kind of remedial / alteration work on LUL usually goes to minor works and takes about 10 years to happen).
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Post by citysig on Jul 13, 2009 19:57:36 GMT
Why not actually *use* reflection ? I suggest relocating the working signal itself - and use reflected light as the indication. Where the signal is now, place a ''dumb'' signal head made up of multi prisms of coloured glass (sort of like red reflector lights on cars). No moving parts, no electrical bits, just a post with 4 coloured prism clusters [1]. At track side at a safe [for T/O etc] working location have the actual signal that beams laser light at the prisms, all angled in such a way that correct sighting is obtained, and ensuring the beam can't be obstructed, and ensuring the prisms can't reflect other light sources (this ain't rocket science). Errr yesss ... type approval might also arise. I'll put this in as a staff suggestion [1] as an afterthought, just two prism clusters on a post and change the laser light beam colour for the various aspects R GY GG. -- Nick Might be cheaper to move the signal to the other side of the 4 foot. Now there's a thought All you would need then (apart from lots of screening, huge arrows to let everyone know which line the signal is for etc. etc.) is to shut the Picc down in order to relamp the signal. Simplez. ;D
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Post by d7666 on Jul 13, 2009 20:18:16 GMT
Well yes - but I was assuming (dangerous assumption) that surely they'd already covered that option and for some reason rejected it.
-- Nick
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roythebus
Pleased to say the restoration of BEA coach MLL738 is as complete as it can be, now restoring MLL721
Posts: 1,275
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Post by roythebus on Jul 14, 2009 6:36:16 GMT
Absolutely dangerous for the motorman and railway safety in general. It seems there are complete and utter idiots (I'd use a stronger word but would get banned) running the job.
How on earth is anyone supposed to clearly see a red aspect at that signal? what did the signal sighting committee have to say about it? The ASLEF H&S reps etc.
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Post by railtechnician on Jul 14, 2009 7:23:59 GMT
Could a reinforced glass panel not be put in front of it, instead of the bars? I had suggested a full cage with an aperture at the front large enough to allow proper sighting of the signal from the drivers cab. However, seeing the "driver's eye view from the cab" I would now suggest an alternative. Remove the existing cage and platform completely and mount a new L shaped platform and cage to the left and rear of the signal head, i.e. predominantly on the street side of the parapet, such that the signal is neither obscured from the front nor the side (pigs ears) but allowing a lineman to relamp in safety and still to be able to reach all around for maintenance from the lhs of the signal.
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Tom
Administrator
Signalfel?
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Post by Tom on Jul 14, 2009 7:35:24 GMT
I still don't understand why the signal even needed a mesh. When we repositioned one at Harrow a few years ago, all that was needed was the tubing (admittedly the potential drop was a bit less).
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Phil
In memoriam
RIP 23-Oct-2018
Posts: 9,473
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Post by Phil on Jul 14, 2009 7:56:42 GMT
(admittedly the potential drop was a bit less). Electrical or physical? ;D ;D ;D
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Post by Dstock7080 on Jul 14, 2009 9:34:37 GMT
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Tom
Administrator
Signalfel?
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Post by Tom on Jul 14, 2009 10:57:13 GMT
(admittedly the potential drop was a bit less). Electrical or physical? ;D ;D ;D Physical ;D
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Deleted
Deleted Member
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Post by Deleted on Jul 14, 2009 23:48:42 GMT
Does no one find it surprising that after this thread is posted here that the cage begins to get altered?
I am surprised that the lower bar was removed - surely the upper bar is the more important, as it restricts the view of the red aspect?
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Post by Dstock7080 on Jul 15, 2009 3:27:26 GMT
I can assure you that BEFORE anything was posted here a strong complaint was made, a site visit (by DMT) arranged and then a call was put out for the ERU to attend an 'urgent' job.
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Post by railtechnician on Jul 15, 2009 11:08:41 GMT
Ah yes, now if the top bar were removed and the bars and cage to the right too it would be almost perfect. Perhaps chopping the front of the platform out so that the ID plates could be clearly seen would complete the job as far as clear signal sighting is concerned. I suppose the structure would then have to be assessed for safety as the remaining bars might be of insufficient rating to prevent a fall
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Deleted
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Post by Deleted on Jul 15, 2009 11:23:07 GMT
i would like to have known why the ERU was called for what could they do??
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Deleted
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Post by Deleted on Jul 16, 2009 10:41:41 GMT
I can assure you that BEFORE anything was posted here a strong complaint was made, a site visit (by DMT) arranged That bit I knew because I sent 'im there after getting a report from a driver Never let it be said controllers don't do anything.
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Deleted
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Post by Deleted on Jul 16, 2009 15:13:03 GMT
Am I being hopelessly optimistic in this day and age to suggest that the solution may to ask S&T engineers not to stand back to admire their work......
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Deleted
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Post by Deleted on Jul 16, 2009 18:27:46 GMT
I can assure you that BEFORE anything was posted here a strong complaint was made, a site visit (by DMT) arranged That bit I knew because I sent 'im there after getting a report from a driver Never let it be said controllers don't do anything. I would like to think a Controller would have asked the DMT to go the location rather than 'sending 'im there'.
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Deleted
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Post by Deleted on Jul 16, 2009 21:15:34 GMT
That bit I knew because I sent 'im there after getting a report from a driver Never let it be said controllers don't do anything. I would like to think a Controller would have asked the DMT to go the location rather than 'sending 'im there'. <rolls eyes> unnecessary point really, of course I asked him to go but I'd have been rather surprised if he'd refused without a good reason.
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Phil
In memoriam
RIP 23-Oct-2018
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Post by Phil on Jul 16, 2009 22:11:47 GMT
I would like to think a Controller would have asked the DMT to go the location rather than 'sending 'im there'. <rolls eyes> unnecessary point really, of course I asked him to go but I'd have been rather surprised if he'd refused without a good reason. And presumably if the DMT had refused to go, the union would have brought the service to a stand if the controller had not already done so.
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Post by citysig on Jul 17, 2009 8:24:27 GMT
i would like to have known why the ERU was called for what could they do?? As you should know, they are the sort of people who, when tasked, tend to arrive at a location and do more or less whatever is required of them without too much question. There is no messing around taking huge possessions, shutting the railway down and such like. They are manly(*) enough to afford themselves sufficient protection, and in cases like this, they are the people who, if tasked with "ripping the bloody thing down" will normally happily oblige as far as possible. *I use this word in the "old" sense, and I am not suggesting for a minute that they are all men, or that men can do the job better than women blah blah blah.
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Deleted
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Post by Deleted on Jul 17, 2009 20:20:34 GMT
i would like to have known why the ERU was called for what could they do?? ERU will go otherwise you will wait yonks for a contractor to do the work. Fixing up a mesh like that is not the work of a TO as far as i am aware. +1 to Metcontrols post.
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Post by d7666 on Jul 17, 2009 21:27:53 GMT
+2
ERU get things done.
I've only neen involved directly with getting them out once, and one other time seen them in action.
''Calling international Rescue'' is not so far from it.
-- Nick
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Post by Dstock7080 on Aug 11, 2009 10:55:00 GMT
As sort of a final closure on this matter a small further modification has been made, the top bar is now thinner and the identification plates have been moved: tinyurl.com/mx2y3y A job done, well??
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Post by railtechnician on Aug 11, 2009 12:37:50 GMT
As sort of a final closure on this matter a small further modification has been made, the top bar is now thinner and the identification plates have been moved: tinyurl.com/mx2y3y A job done, well?? Now imagine what your comments might've been had the original installation looked as it does now. In my opinion there is still room for complaint. For instance cut outs in the mesh to allow the pig's ears to be properly viewed although moving the front right post back to just behind the pig's ears would be more of a proper job!
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Deleted
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Post by Deleted on Aug 11, 2009 20:12:44 GMT
Amazing! I'm gobsmacked after reading this thread!
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Post by stanmorek on Oct 3, 2009 11:24:28 GMT
If this has been designed by the Civil Engineers then I'm not surprised. We did have a lot of difficulty educating them about signalling a few years ago and I suspect not all of them learnt. I brought this up with the aforementioned group who deny all knowledge of the incident. They are not the authority on civil engineering matters as the capitalisation implies. There many other civil engineers in the company.
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