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A.T.O.
Apr 22, 2005 11:17:51 GMT
Post by q8 on Apr 22, 2005 11:17:51 GMT
 Can anyone tell me where (on the net or ina book) I can find out how the ATO on the Central line works? I have a book telling me how the Victoria line system functions but would like to find similar for the Central. Anyone?.... 
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Deleted
Deleted Member
Posts: 0
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A.T.O.
Apr 22, 2005 11:34:06 GMT
Post by Deleted on Apr 22, 2005 11:34:06 GMT
look for the word WESTRACE as this is the signalling system worked on the central line other then that i can not help
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solidbond
Staff Emeritus
'Give me 118 reasons for an Audible Warning on a C Stock'
Posts: 1,215
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A.T.O.
Apr 22, 2005 11:43:41 GMT
Post by solidbond on Apr 22, 2005 11:43:41 GMT
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A.T.O.
Apr 22, 2005 11:45:51 GMT
Post by Dmitri on Apr 22, 2005 11:45:51 GMT
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Tom
Administrator
Signalfel?
Posts: 4,098 
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A.T.O.
Apr 22, 2005 19:06:19 GMT
Post by Tom on Apr 22, 2005 19:06:19 GMT
One of my additional roles (as well as being a Signalling Designer) is that I'm also taking over the role of ATC Engineer. I was recommended by my Principal Engineer to read it as a good introduction. Any questions I'll do my best to answer, but I've only been doing the role for five days. |
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A.T.O.
Apr 23, 2005 2:23:18 GMT
Post by q8 on Apr 23, 2005 2:23:18 GMT
Thank you gentlemen for the replies. I have had a look and found it interesting and informative. I now look forward to the day when it is adopted on the SSL lines and see how the Aldgate area is further b*ggered up.  If the new re-signalling contract for the SSL lines includes replacing signals as it states then perhaps they will consider the driver for once and put the damn things on the left hand side of the track. While they are about it they might also consider putting a dedicated headway clock on the wall at certain stations again as we found it very useful in the past. Perhaps they might also get rid of that stupid octal numbering system too and have set numbers on a line basis al la Paris Metro. However I'm not holding my breath. 
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A.T.O.
Apr 23, 2005 6:26:38 GMT
Post by Dmitri on Apr 23, 2005 6:26:38 GMT
While they are about it they might also consider putting a dedicated headway clock on the wall at certain stations again as we found it very useful in the past.  I wonder how can you live without headway clocks... They should get rid of the old hardware that doesn't understand '8' or '9' first... |
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A.T.O.
Apr 23, 2005 9:09:21 GMT
Post by q8 on Apr 23, 2005 9:09:21 GMT
They should get rid of the old hardware that doesn't understand '8' or '9' first...
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Ah Dmitri the old hardware DOES understand 8 and 9. I have book that has descriptions of the first programme machines installed on the Northern Line. In that book there are pictures of the programme rolls and the machines themselves. The programme rolls have the set numbers printed on them and they include 8/9. The machines had FIVE fingers for number reading not just four. So it's only a matter of putting that other finger back and hey presto!! ;D
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A.T.O.
Apr 23, 2005 13:30:49 GMT
Post by citysig on Apr 23, 2005 13:30:49 GMT
Here we go again ;D Bit off thread (just a tad) but Mr Q8, your mention of these headway clocks. You may be interested to know that the modern computer system (as it was) at Baker Street, actually had a sort of headway clock built into it. It monitored the Jubilee at Finchley Road to keep all trains at a regular headway. Train 1 leaves at say 0800. Train 2 arrives at 0803. Computer calculates headway as 3 minutes. Train 3 arrives at 0807. Computer revises headway to 4 minutes. Train 4 arrives a few minutes late at 0813 with train 5 right behind. Computer revises headway to 6 minutes, train 5 when it arrives straight after train 4 is held for 5 minutes. Everything gets later and later. Now put this design into the hands of drivers, and watch as everything gets later and later - even if you keep the headway as "3 minutes." Put guards back and let them do the maths and hurry the train out dead on 3 minutes, and you may have something. |
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A.T.O.
Apr 23, 2005 16:29:10 GMT
Post by q8 on Apr 23, 2005 16:29:10 GMT
Put guards back and let them do the maths and hurry the train out dead on 3 minutes, and you may have something.
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Har har my own sentiments entirely. (what's this, me agreeing with Mr Citysig!!! unheard of !) A Guard was a sort of mobile train regulator as well as a train manager/safety supervisor/trip log compiler/tea maker and general dogsbody. Sometimes though you could get to an intermediate point (generally Embankment )where the staff would come to you and say "regulators says down 5 (or whatever) gap behind you" this was covered by keeping the starter at danger but not always. Sth Ken was another favourite place for this
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A.T.O.
Apr 23, 2005 17:04:14 GMT
Post by Dmitri on Apr 23, 2005 17:04:14 GMT
Bit off thread (just a tad) but Mr Q8, your mention of these headway clocks. You may be interested to know that the modern computer system (as it was) at Baker Street, actually had a sort of headway clock built into it. It monitored the Jubilee at Finchley Road to keep all trains at a regular headway. Bloody complicated, I'd say. The 'headway clocks' as can be found here are simply stopwatches which are reset when train departs (probably with the same stuff that changes signals to red). Then you order drivers not to depart from station with less than 1:15-1:20 interval, and... you've got things moving  . |
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A.T.O.
Apr 23, 2005 18:47:20 GMT
Post by citysig on Apr 23, 2005 18:47:20 GMT
Bloody complicated, I'd say. The 'headway clocks' as can be found here are simply stopwatches which are reset when train departs (probably with the same stuff that changes signals to red). Then you order drivers not to depart from station with less than 1:15-1:20 interval, and... you've got things moving . There are some areas where the booked headway is only slightly more than the signalling section ahead, so a clear signal will not be shown until almost the headway time. Plus controlled areas have "timed" signals to ensure each train has a clear signal at the headway time. The only time this can fall down is following a cancellation - the following train will be held until it's own headway unless adjustments are made. Should the headway clock fail, or should each driver wait until the very last second to think about closing doors and moving off, you find yourself creating a headway a few seconds longer than desired. You must always add the human factor. Besides, I mentioned guards returning because let's face it drivers have enough to watch as it is. CCTV, Signal Aspect, and those last-minute punters who throw themselves at the doors. |
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Can anyone tell me where (on the net or ina book) I can find out how the ATO on the Central line works? I have a book telling me how the Victoria line system functions but would like to find similar for the Central.
I wonder how can you live without headway clocks...
.
