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Post by superteacher on Apr 15, 2008 22:32:45 GMT
In the current Central line timeable (WTT 64), there is something which baffles me somewhat.
Train 130 is the inter-peak stabler in Loughton sidings, and is booked to leave the sidings at 15:57, run empty to Debden and then take up service there at 16:21. Nothing wrong with that, however in the meantime train 110 terminates at Loughton at 16:08, then stables! Could they not save a train (and duplicating drivers) by simply extending train 110 to Debden, where it could take over the path currently operated by train 130. It would arrive at Debden at around 16:11. giving it enough time to turn around ready for the 16:21 departure.
Now I know they won't alter the timetable before it is superseded (don't want to crash the computers at Wood Lane do we!!), but can someone explain the logic behind what I have explained above. It seems silly to stable a train so early, and bring another one out to effectively replace it!
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Post by suncloud on Apr 19, 2008 1:02:33 GMT
My thoughts... (remembering I'm a total layman) is that it could be to do with:
a) stock rotation - iirc, trains need a depot check every 48 hours, so any train starting the day at Loughton would need to finish the day at Hainault or Ruislip.
b) crewing - Loughton's a crew depot and it wouldn't be a big surprise if train 130 is picked up by a Loughton driver starting his shift and train 110 is brought in by a Loughton driver ending their shift.
c) timetable reliability... No matter what happens to train 110, 130 will be able to start from Debden on time.
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Post by superteacher on Apr 19, 2008 9:40:12 GMT
Good points - but in answer to your points:
a) They could still manage the stock rotation without the silly stabling that I mentioned. Rotation is built into the timetable anyway.
b) They could achieve the crew change in the platform at Loughton without needing to stable.
c) If timetable reliability was a factor, would they not do it with more trains?
I am a bit of a timetable nut as you can imagine, and I only flagged it up because I haven't seen it before in previous timetables.
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Post by Deleted on Apr 19, 2008 17:56:32 GMT
Something to do with making sure trains are prepared in the depot no more than 24 hours before entering service?
Does train 130 later stable somewhere odd where it cannot be prepared overnight, necessitating a late prep to allow it to enter service the next morning?
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Post by superteacher on Apr 19, 2008 20:16:54 GMT
Train 130 stables in Hainault depot after the evening peak.
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Phil
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Post by Phil on Apr 20, 2008 18:23:08 GMT
Gives the chance for train 110 to be looked at in normal engineering hours, particularly if it has a non-critical defect (and has been put on that duty for that specific reason).
Back in the day, the engineers could have a bus in ( with clapped-out engine due for change) at the end of the morning peak and have it out for the evening peak with new engine fitted!!! Doubt if that's possible these days, but to have a train in during late afternoon certainly allows some continuity of engineering.
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Post by Deleted on Jun 8, 2008 22:57:05 GMT
I suspect train 110, in effect provides an east end spare at Lougton during the evening peak, in the same way 130 is spare after the morning peak.
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Post by superteacher on Jun 14, 2008 8:47:16 GMT
I suspect train 110, in effect provides an east end spare at Lougton during the evening peak, in the same way 130 is spare after the morning peak. Train 130 is a crewed spare after the am peak, whereas train 110 is not in the evening peak. |
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Post by Deleted on Feb 10, 2009 14:11:04 GMT
Is the timetable available on line anywhere or is it only for staff use? In the current Central line timeable (WTT 64), there is something which baffles me somewhat. Train 130 is the inter-peak stabler in Loughton sidings, and is booked to leave the sidings at 15:57, run empty to Debden and then take up service there at 16:21. Nothing wrong with that, however in the meantime train 110 terminates at Loughton at 16:08, then stables! Could they not save a train (and duplicating drivers) by simply extending train 110 to Debden, where it could take over the path currently operated by train 130. It would arrive at Debden at around 16:11. giving it enough time to turn around ready for the 16:21 departure. Now I know they won't alter the timetable before it is superseded (don't want to crash the computers at Wood Lane do we!!), but can someone explain the logic behind what I have explained above. It seems silly to stable a train so early, and bring another one out to effectively replace it! |
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Post by ruislip on Feb 11, 2009 0:57:15 GMT
All WTTs are only available to staff.
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Chris M
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Post by Chris M on Feb 11, 2009 1:07:50 GMT
All WTTs are only available to staff. Although some people have received copies of them when requested under the Freedom of Information Act. Out of date timetables can be more available - MRFS is almost certainly the one to ask about how you would go about finding one. |
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Post by ruislip on Feb 11, 2009 5:01:24 GMT
I have a growing collection of WTT's myself, thanks to EBAY. What will make my collection complete are Central and Met WTTs from the early-mid 70s.
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mrfs42
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Post by mrfs42 on Feb 11, 2009 10:40:11 GMT
If you make a FoI request, I am led to believe that the appropriate WTT is photocopied. There is no charge for FoI requests, provided that the total for copying is under £450. Surprisingly, I've never tried the FoI route for any enquiry. I have a growing collection of WTT's myself, thanks to EBAY. What will make my collection complete are Central and Met WTTs from the early-mid 70s. Hmm. Something that is normally only seen by me and AI: Click That is just about a thousand items (and nearly all of the UndergrounD library).  (for scale, you can just see on the RH edge a Northern Line car diagram).  |
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Post by Deleted on Feb 11, 2009 14:30:15 GMT
Hmm. Something that is normally only seen by me and AI: Click That is just about a thousand items (and nearly all of the UndergrounD library). (for scale, you can just see on the RH edge a Northern Line car diagram). Wow! I thought I had a large collection a few years back when I fished out 13 old timetables from my garage, but you have a serious fetish ;D |
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Post by maxtube on Feb 11, 2009 21:23:36 GMT
I have a Central Line 1995 WTT. Number 55.
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rincew1nd
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Post by rincew1nd on Feb 11, 2009 22:21:07 GMT
you have a serious fetish ;D Believe me, his sandwich fetish is even worse! |
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Post by Chris M on Feb 11, 2009 23:03:38 GMT
you have a serious fetish ;D Believe me, his sandwich fetish is even worse! Well as long as he doesn't have examples dating back to the opening of the Metropolitan Railway... |
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Post by ruislip on Feb 12, 2009 2:43:08 GMT
I have a Central Line 1995 WTT. Number 55. Is that before or after the '62 stock was withdrawn? |
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Post by maxtube on Feb 12, 2009 15:52:05 GMT
I have a Central Line 1995 WTT. Number 55. Is that before or after the '62 stock was withdrawn? After, I think. |
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Post by Deleted on Feb 12, 2009 15:59:19 GMT
I have a Central Line 1995 WTT. Number 55. Is that before or after the '62 stock was withdrawn? Definitly after. I left the Central in 1995 and it was fully 92 stock worked with ATP in operation on the Ruislip branch. |
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