4473
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Journey by Journey / Chiltern Railways services / Re: Chiltern 172s and related Evergreen 3 enhancements
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on: July 26, 2010, 15:46:29
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Rail is often misleading, but not as often as Mordern Railways.....sometimes I get the impression that rail industry journos often know not of what they speak, and just (mis-)interpret press releases.....rather than talk to those on the ground.
Problem is this particular article in Rail (Issue 643 page 50) wasn't just slightly wrong. Regarding 'remodelling Aynho Junction' it actually reads: 'Here the 50mph flyover will be replaced with a flat junction in the down direction...'How they get to that, given the stuff in the track access application, and on the Evergreen 3 site, I'm not sure... Paul
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4476
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Journey by Journey / Chiltern Railways services / Re: Chiltern 172s and related Evergreen 3 enhancements
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on: July 25, 2010, 17:58:45
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Ok, but I wouldn't want to go over that flyover at 90ish mph!
I can see what you mean but at the same time I don't think the flyover itself seems to be the main limiting factor in the area, having looked up the speed details. In NR» 's public online sectional appendix, (which is an April 09 snapshot unfortunately) there are some indications that the main reason for slowing down is the junction point work and their approach. In fact, trains travelling in the down direction on the reversible up line have exactly the same speed restrictions. It gets even worse for trains that can't run at sprinter speeds, because the down direction limit is then 25 mph on both lines. In the up direction the non-sprinter speed is 35 mph up the gradient from the junction, the down line isn't bidirectionally signalled as far as I can tell. What all that suggests is that the problems might be to do with with the embankment earthworks. It would be interesting to hear from someone on the Evergreen project! Paul
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4477
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Journey by Journey / Chiltern Railways services / Re: Chiltern 172s and related Evergreen 3 enhancements
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on: July 25, 2010, 16:36:34
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I've read that a new 100 mph down line will be plonked next to the up line. The flyover route has a severe speed restriction, and Chiltern want/need as much 100 mph as poss.
Not according to the track access application: (73rd SA) Aynho Junction
Install new turnouts at Aynho Junction on up (90 mph) and down (85 mph); Raise line speed from 90-65-90 to 90-100 mph on the up and 100-50-40-90 to 100-90-85-90 on the down; Upgrade 15 mph trailing crossover on the Didcot - Chester Line (DCL) to 50 mph; Install new 7-day railway 50 mph facing crossover on DCL north of existing crossover Paul
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4478
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Journey by Journey / Chiltern Railways services / Re: Chiltern 172s and related Evergreen 3 enhancements
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on: July 25, 2010, 16:14:46
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I hope they quadruple track the area between the junction and West Ruslip (3 tracks at the mo) so that there is a big enough loop for the stoppers to be overtaken by the expresses (plus a margin for some delays)
They get the effect of a four track railway for overtaking purposes, because the existing down main track will become a down loop including the platform at South Ruislip, and the existing Up Loop through West Ruislip already provides a platform that allows up trains to be overtaken there. Talking of a diff junction: Does anybody know whether the flyover at Aynho will be retained for flexibility? I'm assuming that this junction's remodelling will have to start soon - quite a large project! Is that based on a misleading Rail magazine report that a 'crossover would be provided' at Aynho? AFAICT▸ from discussions elsewhere the flyover remains the normal route, however there is also a new crossover being put in the DCL for extra flexibility (for 7 day railway single track working I believe). There was no sign of anything in that Chiltern track access application (that listed all the work sites) to suggest that the flyover route wouldn't be used. Paul
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4480
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Journey by Journey / Chiltern Railways services / Re: Chiltern 172s and related Evergreen 3 enhancements
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on: July 24, 2010, 20:08:44
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... Northolt Junction layout will be done in 2011, and the full new TT will come in for May 2011 - with the use of more loco & coaches to free up 172 cover.
Read a report that the Northolt Jn alterations have just this week been approved by the local planners in Hillingdon, and work is expected to start now and take 'about 8 months'; so March 11 at the earliest? I think that must be the key that unlocks the main line speed increases towards London?
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4484
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All across the Great Western territory / The Wider Picture - related rail and other transport issues / Re: Rail passengers 'shun confusing ticket machines' (BBC News 20/07/2010)
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on: July 21, 2010, 20:12:30
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So how close are we realistically to having Oyster▸ -like technology on National Rail? Anyone know?
Touch in - touch out (or, swipe to open the barriers at either end) and the equipment automatically calculates the most advantageous rate for that particular journey at that particular time, less a discount for using the service. Couldn't be easier or more convenient.
SWT▸ 's card does not provide prepay (stored payment) system, it is seasons only; and I cant see it ever working like Oyster PAYG▸ on the main national network. It's important to realise that Oyster PAYG works in a well defined area which is predominantly barriered, with only minimal ticket types available, all singles, one class, and there are no period returns for instance. The key to PAYG's relative simplicity is that it can deduct a maximum cash fare on entry (equivalent to a sort of deposit), and refund as appropriate on exit. For a similar system on NR» , where distances and therefore costs can be pretty significant, the preloaded balance would have to be significantly higher, or failing that you'd need to have a system that could talk to your bank account. Just try and work out how a putative national system would charge someone who touched in but didn't touched out at their destination? What charge should now be made? Paul
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4485
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Sideshoots - associated subjects / The Lighter Side / Re: Are they off their trolleys?
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on: July 19, 2010, 17:55:12
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It's a bit more important, it's a TPWS▸ loop. But definitely part of the normal infrastructure as you say. PS, looking at the picture full size, it looks as if it's been damaged, as the cross member of the frame is missing. Perhaps something was lost in translation, and it should be 'damaged BY a shopping trolley' perhaps? Paul
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