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Post by jardine01 on May 11, 2011 18:06:34 GMT
Do Central line trains run faster if they are late or slower if they are early? I know on the Jubilee line they run slower if they are early and go fast when they are late. Thanks
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Post by jardine01 on May 11, 2011 18:08:37 GMT
Sorry my spelling mistake the title is supposed to say Do Central line trains run faster if they are late?
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Deleted
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Post by Deleted on May 11, 2011 20:33:22 GMT
Basically, no, the Central Line is max performance constantly.
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Post by causton on May 11, 2011 21:31:58 GMT
No - otherwise there is not much point having the better performance if it is not used half the time! The Jubilee trains will be going faster all the time once a new timetable kicks in and all of the line is running automatically
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Post by Deleted on May 11, 2011 21:39:04 GMT
Difference is though, the Jubilee system will regulate to a timetable no matter what. To get max performance, you need a timetable that pushes the system. That schedule regulation server is a smart piece of gear... hence target speeds are given based on distance to train ahead, and relative to timetable.
On the Central, ATO always drives as fast as possible, that's the difference. Target speeds are assigned based on the state of the blocks ahead and any PSR/TSRs, not the timetable though ISTR the facility exists but isn't used for this to be done.
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Post by Deleted on May 11, 2011 21:42:17 GMT
if its late, it runs late... anything serious, and trains will be turned short... also, to be running late might impact on the T/Ops meal relief, so this also has to be considered.
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Post by superteacher on May 11, 2011 21:58:05 GMT
if its late, it runs late... anything serious, and trains will be turned short... also, to be running late might impact on the T/Ops meal relief, so this also has to be considered. Although these days, there is (over)generous standing time built in at some locations, and (over)generous turn around time at the terminus. This kind of defeats the object of having the increased performance in my opinion!
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Post by Deleted on May 11, 2011 22:01:26 GMT
Only to be expected! There's only so many trains you can stuff down the pipe and across North Acton Junction before the signalling system keels over! Ahem! <tongue in cheek comment>
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Post by auxsetreq on May 11, 2011 22:19:34 GMT
I didn't finish on time today. In fact I finished thirty seconds early. OMG I'm so norty! Tomorrow, another interview in the back office by my sooooooperior and a form to fill in to let the world know I admitted to the crime. Meanwhile, to celebrate an extra thirty seconds of my own time given to me for free, I had a Lemsip Max Strength when I got in. Ceiling Cat had it ready and waiting for me on my arrival, along with a soothing purr.............
I've noticed that if a train is on time the TS will be at it's set rate for being on time. Say 55 for St Paul's to CL WB. If it's running late, the TS increases to 65 if the road ahead is clear. Elsewhere too. Signals like the approach to Woodford WB ( the first colour light after the junction ) will also clear earlier or be clear already if the train is late rather than check the train down as that irritating signal is want to do when running on time. So, from my personal observation, I'd say "yes", if a train is running late the *signalling* will allow it to run faster so long as the road ahead is clear. However, as I'm always *entirely wrong* some algorithm firmware boffin will come on here to correct me and tell me that even though I do it day after day after day after day to the power of ten million squared..........What I'm observing is an *illusion*, a dream scenario. Like Olly Murs sharing a bedroom scene with Dot Cotton ( really, he wants to do it! UGH! ) or dancing as good as Fred Astair in a snap brim..........
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Post by plasmid on May 11, 2011 23:45:20 GMT
If trains are running early on the Central the train will be held in the platform until the correct departure time. Whether if he is held because of a Red Signal or because or word from the Line Controller I don't know.
At least once a week on my journey Westbound we are held at Bethnal Green (always Bethnal Green) until the train is due to depart because of early running.
If the train is late by a little bit then I suspect it will either slightly go into the T/Op's meal relief or the T/Op will close the doors as quickly as possible. This reminds me of a T/Op who opened the doors at every station, and the second the doors opened he said the train was ready to depart =/ seriously? Then he would prompt peasants to quickly alight and shut the doors early.
And if they are really late they will be turned around early.
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Post by auxsetreq on May 12, 2011 8:44:21 GMT
Actually the best example is going east from WR into Northolt. On time or early the train is checked down from the colour light in increments at each bmb and held in the platform for correct departure time. If late it's the full 100 in and a 100 straight out................
Usually for me it's the capital crime of being late with subsequent exposure to men in wigs and gowns at my trial. On arrival at WR I have to go upstairs for a nice long leak, fully shake all the drips off right down to the last straggler, eco flush, wash my handies, check my comb-over, check my lippy, get a cup of synth coffee. Then back out again to find the stick naturally orfff.........Oh no, now I'm for it! Not because the train is late, but because I wasn't on the train to make a with-in thirty second announcement like - " This train will be delayed while I go upstairs for a slash and check my make-up"
We do have these things called *held* visuals in the cab. If the train is early a *held* will automatically come on while in the platform. Once out, we can go. The L/C signaller can put a *held* visual command on for any platform if he wishes to regulate the train. Trouble is, they can be spooooorious, and come up on their own for no reason at all anywhere which can cause delays. So, after two minutes of a *held* not going out a driver is supposed to call up the signal desk and say "I've got a *held on* do you know anything about it?"
Not so much meal reliefs, but finishing time. That's the important one.........
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slugabed
Zu lang am schnuller.
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Post by slugabed on May 12, 2011 9:12:36 GMT
What a savidge.....but soooo informative,as always....
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Post by Deleted on May 19, 2011 19:32:24 GMT
Great to read that the Jubilee has a dynamic ATO that goes according to an uploaded timetable. The British engineers installed such an ATO system to its then-colony many years ago - and it worked!
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