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Post by superteacher on Feb 21, 2010 14:17:50 GMT
Why was the Met closed from Baker Street to Aldgate this weekend? The H & C was running Baker Street - Barking, so the Met had access to this part of the line.
Any ideas?
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metman
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Post by metman on Feb 21, 2010 15:47:04 GMT
There was a thread earlier with the explanation.....
The engineering work was cancelled, but too late to book extra drivers for the run to the City.
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Tom
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Post by Tom on Feb 21, 2010 18:24:10 GMT
Two reasons I can think of: no platform at Baker Street to reverse in due to the possession boundaries, and no way to get the stock to and from Neasden. Outstabling isn't an option either as there aren't the facilities for the depot staff to do the train preps.
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Colin
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Post by Colin on Feb 21, 2010 19:32:07 GMT
A simpler answer is that every weekend since January, and onwards up to more or less the end of March, there is engineering work taking place at Aldgate to install new train arrestors.
So Met trains were never going anywhere near Aldgate this weekend. The H&C could run a service as this work is at the District end of the platforms - and the District was able to run as the work site was screened off.
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Post by superteacher on Feb 21, 2010 19:51:13 GMT
A simpler answer is that every weekend since January, and onwards up to more or less the end of March, there is engineering work taking place at Aldgate to install new train arrestors. So Met trains were never going anywhere near Aldgate this weekend. The H&C could run a service as this work is at the District end of the platforms - and the District was able to run as the work site was screened off. They still could have run them to Moorgate though, which is what they usually do when either Aldgate is unavailable, or when Liverpool Street is being used to reverse H&C trains. |
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metman
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Post by metman on Feb 21, 2010 20:03:26 GMT
I'm sure that was the plan to terminate at Moorgate, but it was cancelled for some reason - or an I thinking of something completely different ;D
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Colin
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Post by Colin on Feb 21, 2010 20:24:31 GMT
Something different I suspect. The relevant previous posts elsewhere on the forum may help: I see that this weekends closure has been revised from Finchley Rd-Aldgate to Baker St-Aldgate. The planned weekend possession at Baker Street has been cancelled. Unfortunately there was insufficient notice to allow the full Met weekend service to be re-instated and thus the planned temporary timetable will operate instead. However it has been determined that there was just enough turn around time in this timetable for the trains from Watford and Uxbridge to be extended to Baker Street and return north to pick up their booked workings. This will be done on an ad-hoc basis on the day and it is therefore impossible to say with certainty which platforms will be used at Baker St for reversing except that they will definitely not be using platform 1 as this remains out of use and will continue to be so next week as well, meaning that the current weekday alterations will continue. As you can see, trains were already being extended to Baker Street. Extending them further to Moorgate would have complicated the issue even more. |
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metman
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Post by metman on Feb 21, 2010 20:58:46 GMT
Something different I suspect. Nope, that's what I was thinking of! Must of got a different idea in my head  |
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Post by citysig on Feb 22, 2010 9:28:17 GMT
It has already been answered across the 2 threads, but just to add my bit...
As has been said many times before on here, these works are planned many months in advance. The Train Operator duties are also planned well in advance. When it is planned to not run as many trains, not as many train operators are booked to work. This has the side-effect of allowing certain training courses to be scheduled, leave to be used up etc. etc. For example, a Train Op who would normally have been working late shift on a Sunday, cannot attend a course first thing Monday morning. However, give them the Sunday off and it makes it easier.
If works are cancelled at short notice, you cannot then turn round to loads of train operators and tell them that they will now have to work. You have to run with the service you had planned, or make revisions where you can based on train operator availability.
This weekend, luckily the trains due to reverse via depot or at Swiss Cottage had been given plenty of turn-round time, meaning they could all manage a trip to Baker Street and not be late on the northbound.
The city was available to Mets as far as Moorgate, and on at least one occasion I looked at pushing one through to cover a gap in the H&C service. The problem there though was that although the gap would be covered in the city, there would be a larger gap to Uxbride or Watford.
The forward planning of these works is one reason why, even when platform 1 is completed, the platform 3/4 works won't start immediately. The "window" for those works (which was the planning needed to get them to happen) has gone, and a new "window" some weeks or months in the future will have to be scheduled.
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Post by ruislip on Feb 22, 2010 18:30:43 GMT
A simpler answer is that every weekend since January, and onwards up to more or less the end of March, there is engineering work taking place at Aldgate to install new train arrestors. Are these arrestors also going to be installed at Moorgate in platforms 3 and 4? |
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Colin
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Post by Colin on Feb 22, 2010 19:28:43 GMT
I would have thought so - AFAIA they are required at all locations where an S stock will approach the end of a given piece of track. Unless of course Aldgate is a special case on account of how close the terminal tracks are to the District line  |
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Chris M
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Post by Chris M on Feb 22, 2010 19:41:53 GMT
I would think it would more depend on the capability(and condition?) of the current arrestors rather than simply the location. I have no idea what the specs are for any arrestors on any railway, but it must be that the existing ones at Aldgate are sufficient to cope with the impact of an A stock or a C stock (hence the existing stocks are able to run into those platforms) but would not be able to arrest an S stock.
If the facilities at Moorgate, HSK, Ealing Broadway, Wimbledon, etc are not up to the job then they'll be replaced, if they have what it takes then I would imagine they'll just be left as is.
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Post by citysig on Feb 23, 2010 9:27:01 GMT
Arrestors are simply posh buffers. At the end of the day, apart from a bit of updated hydraulics, they are lumps of metal fixed to the end of the running rails.
The change of design is presumably related to a)updating such buffers to today's standards on such items and b)updating which parts of a train come into contact with the arrestors/buffers. No good having something that is meant to stop the train, end up squashing the driver in the process.
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