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Post by metrolander on Oct 14, 2010 18:18:31 GMT
Hello everyone
I was at the 'Bush yesterday going to Westfield and back, when stood on the northbound platform I noticed the signal gantries at the south end of the station, and I was somewhat confused...
Admittedly, my knowledge of railway signalling is barely above layman, largely informed by the likes of Tubeprune's site etc and reinforced by subsequent observations when travelling... Not even in the same UNIVERSE clearly as the expertise that exists on this forum so forgive my very stupid question, but...
What are the various signals for at the south end of both platforms? The southbound platform has what I would now know to term a station starter, but it has two junction indicators (feathers right?) which appear to show two diverging routes right. The northbound platform also has a signal at the south end, so I imagine this might be a wrong-road starter or something like that, also with a junction indicator right.... Plus, it struck me from where I was stood that the signal would be behind the south end cab of say a 4-car train (sadly my 3-car 378 didn't allow any verification of this).
Basically, have I understood this right? And if so, what happens south of the 'Bush?? I am quite unaware of the little ins and outs of this line, have only ever travelled towards Clapham a handful of times and never paid the sort of attention to minutae as I do now!
Thanks in advance
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Post by Deleted on Oct 14, 2010 19:02:54 GMT
Approaching Kensington Olympia, the next station south, is a crossover; are the 'feathers' angled towards 3 o'clock and 2 o'clock? There is also a 'loop' into the platform, so signalling may be set up for that to occur also.
Both lines would appear to be set up for reversible working; that is signalled for train movements in either direction on both lines.
I've not looked fully at the signalling arrangements on the West London Line, but have travelled on it on a few occasions.
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Oracle
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Post by Oracle on Oct 14, 2010 20:53:37 GMT
I have just checked videos on YouTube again to confirm what I thought: at KO there are three lines now, with trains heading south usually running past the SB (Clapham direction) platform, and through trains the main NB one, with stopping trains using a NB loop. However, all three lines appear to be bi-directional with signals at the south end of the station, and points SB from the middle road to the SB. I am sure that in the past there was four-tracking at KO with two through roads, plus from the north two? into and out of the former Motorail bay platforms.
I have never been there but query if trains can run south on the NB at Shepherds Bush to avoid SB terminators waiting to be sent back?
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Post by gantshill on Oct 14, 2010 21:28:16 GMT
I have travelled south from Shepherd's Bush (since the Overground started), and we stopped at the northbound platform at Kensington Olympia. I cannot remember now if we travelled south from the Shepherd's Bush northbound platform (but I think we did). We overtook a train on the southbound line between Shepherd's Bush and Kensington Olympia. I don't recall where we regained the normal left hand track.
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Post by metrolander on Oct 14, 2010 21:35:02 GMT
Thanks everyone, makes a whole lot more sense now; should I have occasion to travel further south I will have a butchers for myself!
Mr Artery; yep, as I recall the feathers were indeed 2 o'clock/3 o'clock exactly as you describe.
Mr Oracle; I had been aware of the former Motorail terminal at Olympia, I wondered if that might had been something to do with it. As for running SB on NB, clearly (even to ignorant me!) there's a signal (and a big proper job, not a shunt signal) which appears to be for this purpose and was showing a red, so even though I don't know and didn't notice I presume there must be a crossover somewhere to the North. If I were to stab in the dark, I'd imagine at where the disused link to North Pole depot joins in? There's another apparently disused siding at around the same point on the other (east) side of the tracks, makes sense...?
Since I'm on on the West London Line, perhaps I'll cheekily slip another question in. Approaching Mitre Bridge junction northbound, is a signal with 3 feathers; diverging left, straight ahead, diverting right so sort of 10 / 12 / 2 o'clock. I know there's a left there; towards Willesden Junction, I know Southern trains go the other way towards the WCML, but what's the third route? Would be trains be routed here to head through Willesden SW towards Acton? I always imagined that divergence to be from the main part of the WCML rather than from the WLL itself. I wonder perhaps if it's anything to do with access to one of the depots/terminals etc in that area...
Edited to generally be more complete as a reply...
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Post by metrolander on Oct 14, 2010 22:04:26 GMT
Clearly, the fact that Shepherds Bush LO station (or indeed, Westfield) are missing from Google Earth illustrates how dated and therefore incorrect a reference it may be, but a quick scan based on my above hunch does indeed reveal a diamond crossover, between the bridges crossing Mitre Way and North Pole Road. Looking closely at the picture my untrained eye can't even tell if that's all connected but still, forgive me a small self back pat for some logical thinking!
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Post by Deleted on Oct 14, 2010 22:25:20 GMT
I am sure that in the past there was four-tracking at KO with two through roads, plus from the north two? into and out of the former Motorail bay platforms. That's correct - I've never been entirely sure why the new southbound platform was built out from the old in the mid 1990s, covering the former southbound platform line, so that trains now stop on the former southbound through line with the northbound through line now being the bi-directional through line. The original southbound platform is still there I believe, rotting away trackless. (I would have used 'up' and 'down', but haven't got a clue which is which on the WLL!)
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Post by Deleted on Oct 15, 2010 1:10:52 GMT
That's correct - I've never been entirely sure why the new southbound platform was built out from the old in the mid 1990s, covering the former southbound platform line, so that trains now stop on the former southbound through line with the northbound through line now being the bi-directional through line. The original southbound platform is still there I believe, rotting away trackless. (I would have used 'up' and 'down', but haven't got a clue which is which on the WLL!) On the WLL 'Up' is Southbound: but it is fully reversibly signalled (this was done as part of the Channel Tunnel works in the 1990s). As stated Kensington O used to have platform loops on both sides (to give four through roads), with scissors crossovers half way along each platform, as well as various bays (at both ends of the station). With the minimal BR passenger service on the WLL, eventually the southbound (east side) platform and loop fell into disuse - with all services using the west side/northbound platform (and loop) - and, AIUI, the southbound loop was not provided for under the resignalling. When, with increased WLL services, a separate southbound platform was deemed necessary, reinstatement of the loop (and consequent resignalling) could not be justified, leading to the current position. In addition, the sale of land on the east side of the station (for development) I think left insufficient room for platform *and* loop (IIRC the wall/fence is on the old platform). For those with the inclination, at www.networkrail.co.uk/aspx/5523.aspx is the Network Rail CP4 baseline declaration of their network (at 2009) - including running line diagrams ('Track and Route Mileage')
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Post by Deleted on Oct 15, 2010 6:11:28 GMT
(I would have used 'up' and 'down', but haven't got a clue which is which on the WLL!) Up is towards London, down is away. Hence travelling towards Watford Junction on the DC, for example, is down.
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Post by dazz285 on Oct 15, 2010 8:02:52 GMT
From North Pole Junction, where the Eurostar used to branch of to their depot, all the way to Latchmere Junction, points just after Chelsea bridge, is all bi-directional. Hope this makes sense...
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Post by metrolander on Oct 15, 2010 16:00:49 GMT
It does Dazz, thanks again everyone for the input, I might have a butchers at the national rail thing I'd been thinking to myself it was so much easier to find out about the equivalent information (if not officially) for LU lines. Generally on here!
Charlie J - I am aware of the general rule for 'up/down' (a terminology whose application I previously just could not fathom until looking it up) but perhaps Brian shared my confusion regarding the WLL as the line is of course, London - London hence no obvious answer! Thanks etr for the confirmation
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Post by Deleted on Oct 15, 2010 17:54:05 GMT
(I would have used 'up' and 'down', but haven't got a clue which is which on the WLL!) Up is towards London, down is away. Hence travelling towards Watford Junction on the DC, for example, is down. I know the general rule about how up/down is defined - I believe however that 'up' can be towards the head office of the railway company rather than necessarily towards London. Didn't the Great Central have 'up' as northbound from Marylebone? Explaining what's what on the DC lines (of which I'm well aware) doesn't actually tell me anything about the WLL though - but etr220 has already helpfully explained that!
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Post by dazz285 on Oct 15, 2010 17:59:41 GMT
Up/Down... On the NLL Richmond to Camden Road is Up Stratford to Camden Road is Up Camden Road to Stratford is Down Camden Road to Richmond is Down... There that will add confusion to the subject ;-)
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Post by flippyff on Oct 15, 2010 18:06:27 GMT
Hello everyone I was at the 'Bush yesterday going to Westfield and back, when stood on the northbound platform I noticed the signal gantries at the south end of the station, and I was somewhat confused... <snip> What are the various signals for at the south end of both platforms? The southbound platform has what I would now know to term a station starter, but it has two junction indicators (feathers right?) which appear to show two diverging routes right. The northbound platform also has a signal at the south end, so I imagine this might be a wrong-road starter or something like that, also with a junction indicator right.... Plus, it struck me from where I was stood that the signal would be behind the south end cab of say a 4-car train (sadly my 3-car 378 didn't allow any verification of this). <snip> Thanks in advance I think there are different stop car markers for terminating trains at Shepherd's Bush - I think the show 3T or 4T with class 378 underneath...... ? Simon
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Post by Deleted on Oct 15, 2010 18:11:59 GMT
With the minimal BR passenger service on the WLL, eventually the southbound (east side) platform and loop fell into disuse - with all services using the west side/northbound platform (and loop) - and, AIUI, the southbound loop was not provided for under the resignalling. When, with increased WLL services, a separate southbound platform was deemed necessary, reinstatement of the loop (and consequent resignalling) could not be justified, leading to the current position. In addition, the sale of land on the east side of the station (for development) I think left insufficient room for platform *and* loop (IIRC the wall/fence is on the old platform). Thanks for that - makes more sense now. So at the time that the line was resignalled and electrified the only passenger services were the peak hour shuttle from Olympia to Clapham Junction and the Intercity inter-regional services every hour or two. I guess there just wasn't the expectation that servies would develop into what they are today - or that selling the space on the east side of the station was thought to be worth it when balanced against the loss of operational land.
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Post by norbitonflyer on Oct 15, 2010 18:12:31 GMT
Didn't the Great Central have 'up' as northbound from Marylebone? Explaining what's what on the DC lines (of which I'm well aware) doesn't actually tell me anything about the WLL though - but etr220 has already helpfully explained that! Don't know about the GC, but the Midland had mileage based on Derby, and the NER used York.
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Post by Deleted on Oct 15, 2010 18:15:54 GMT
Up/Down... On the NLL Richmond to Camden Road is Up Stratford to Camden Road is Up Camden Road to Stratford is Down Camden Road to Richmond is Down... There that will add confusion to the subject ;-) Confusion? Quite so! I always thought Richmond to Dalston was up and Dalston to Stratford was down, based on where the original North London Railway routes to/from Broad Street ran. I guess it's changed sometime since Broad Street closed in 1986?
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Post by metrolander on Oct 15, 2010 19:06:43 GMT
So basically I will consider it as all roads lead to/from Camden?! Interessant.
I'll keep on keeping my eyes out. I couldn't imagine that line not being there now - the dramatic change of Shepherds Bush alone would require it, they really need to have the frequency and the train lengths asap!
As for those National Rail documents, rather irritatingly they only appear to cover main/outer suburban lines, hence, nothing to do with LO...
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Post by nickf on Oct 15, 2010 19:07:22 GMT
AIUI the line from Dalston Junction to Broad Street was a later addition to the NLL, which originally was a feeder to the docks from the London and Birmingham Railway at Camden. This would make sense of the Up and Down useage outlined above by Dazz285. The NLL referred to the Broad Street extension as The Happy Afterthought, as it was so successful.
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Post by Deleted on Oct 15, 2010 19:12:26 GMT
As the West London started out as a branch off the London & Birmingham it adopted the directions as used on the main line so the up line was from Birmingham to Euston and therefore onto the branch to Chelsea Docks. On extension over the river to Falcon Junction the up direction was retained onwards for the whole of the West London as completed. The various west end lines that made up the North London lines that we have now also adopted the L&B (later LNWR) direction. The opening of Broad Street suited the lines west of Dalston Junction but those east were reversed so that up was also to Broad Street. The much lamented loss of the North London from the London Midland and closure of Broad Street saw the Anglia change the direction of lines between Dalston and Camden Road to suit the direction that applied between Victoria Park and Dalston. The result is that if you stand in the middle of the platform at Camden Road all lines leading away from you are "Down" and coming toward you are "Up".
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Post by slugabed on Oct 15, 2010 19:54:33 GMT
Thanks for that - makes more sense now. So at the time that the line was resignalled and electrified the only passenger services were the peak hour shuttle from Olympia to Clapham Junction and the Intercity inter-regional services every hour or two. Just a detail point: I'm not sure when the re-signalling/track simplification took place,sometime in the 80s,I think,but I believe electrification came a bit later.But at the time of electrification,the WLL definitely had a "proper" service. The initial WLL service from Clapham Jct. to Willesden Jct. was provided by 2-car 1st generation DMUs (Annie and Clarabelle) until about the mid 90s,I'm sure on this as a friend of mine lived backing on to the track at that time. When Eurostar started,the third-rail got as far as North Pole,and I suppose the OHLE was extended South from Mitre Bridge to meet it at some point,probably when the NLL got its OHLE,and enabling a full electric service. That's not to detract from the point that the simplification works at Olympia were short-sighted and will probably,if possible,have to be reversed at some point to restore operational flexibility.... What IS the minimum acceptable width for a platform in passenger use?
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Post by Chris M on Oct 15, 2010 21:39:39 GMT
veryhiddeously expensive, but I believe there is space for the whole station to be moved westwards sufficiently to allow a full width reinstatement of the easternmost platform if needed.
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Post by Deleted on Oct 15, 2010 23:12:59 GMT
As for those National Rail documents, rather irritatingly they only appear to cover main/outer suburban lines, hence, nothing to do with LO... They are all there, but can take some finding (the 'New Lines' are MD120 in LNW_S, the NLL/Goblin EA 1310/20/70 in Anglia). But they do pre-date the ELLX...
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Post by Deleted on Oct 15, 2010 23:19:12 GMT
Don't know about the GC, but the Midland had mileage based on Derby, and the NER used York. The GC mileage origin was IIRC Manchester London Road - Marylebone is the only NR London Terminus at the end (rather than start) of the line - the GCR/LNER/BR/Network Rail mileposts allow for the gaps due to closure and the Met! St Pancras was the origin for the Midland from London - don't know if/when it was remeasured by the MR. But which way is Up is another thing (Up to London is a useful convention, but is not definitive), together with the date/extent it has changed
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Post by glenntandh on Oct 16, 2010 2:29:24 GMT
A few points arising from this discussion.
In 1988 the NLL east of Canonbury West Junction was transferred from the London Midland Region to the LT&S Area of Anglia Region and Dalston Western Junction box was staffed by LT&S relief signalmen when required. At the same time the change of up/down designation of running lines was moved to Canonbury West Junction. By 1992 management and staffing of Dalston box had passed back to "Network North" at Watford and if Camden Road was not restored as the up/down changeover at that time it was when the whole NLL went into the East Anglia Zone of Railtrack in 1994.
The exceptions to the convention of mileposts always being on the down side were the Great Western and the Midland. The T&H Line is 'up' from Woodgrange Park Junction to London St. Pancras via Junction Road Junction and Engine Shed Junction and the mileposts are on the up side. Except that in the last couple of years Network Rail maintenance staff obviously steeped 'Eastern" history have replaced some missing mileposts on the DOWN side!
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Post by Deleted on Oct 16, 2010 18:54:40 GMT
Are London Overground trains operated by tube drivers like the tube?
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Post by harlesden on Oct 16, 2010 19:31:36 GMT
If a LU tube driver wished to drive London Overground trains, he would be required to go through exactly the same training as a totally new recruit. There is no direct transfer between LU and any NR company. London Overground has been operated by London Overground Rail Operations since 2007 as part of the National Rail network, under the franchise control and branding of Transport for London
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Post by Deleted on Oct 16, 2010 21:01:32 GMT
Surely though if a tube driver wanted to change what line they drove, they would just learn that new line? Why do they have to start as a new recruit? I thought the London Overground trains were basically surface stock trains like the district and metropolitan lines?
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Post by metrolander on Oct 16, 2010 21:12:51 GMT
etr, thanks again; your learned wisdom has prompted me to be less impetuous, and more studious in my searching! I'm still trying to work out if WLL is Anglia or Southern, I'm going to search Anglia again but what I'm sure I'm not mistaken of is that no 'Southen' document exists on that site? Or might the WLL be 'Wessex'?? (I'm thinking, Clapham...)
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Post by Deleted on Oct 16, 2010 21:16:51 GMT
I thought the London Overground trains were basically surface stock trains like the district and metropolitan lines? 378s are pretty much mainline trains. Just adapted somewhat for metro-style services.
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