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Post by scheduler on Feb 5, 2018 22:14:16 GMT
Surely it’s possible to reverse a 10 minute service in the platform at Baker Street. For years and years the H&C used to reverse 8tph in the single bay platform at Barking. It just requires a prompt turnaround. If it were, we'd be doing it! A bay platform is designed for reversing. A single through running platform with a shunt move is not, they are entirely different. Shunts, as at Baker Street, involve moves that interfere with one another. Bay platform reverses, as at Tower Hill or Barking do not. |
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Post by superteacher on Feb 5, 2018 22:30:29 GMT
Surely it’s possible to reverse a 10 minute service in the platform at Baker Street. For years and years the H&C used to reverse 8tph in the single bay platform at Barking. It just requires a prompt turnaround. If it were, we'd be doing it! A bay platform is designed for reversing. A single through running platform with a shunt move is not, they are entirely different. Shunts, as at Baker Street, involve moves that interfere with one another. Bay platform reverses, as at Tower Hill or Barking do not. They have reversed 12 tph at South Ken before via the trailling crossover (with stepping back). |
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MoreToJack
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Post by MoreToJack on Feb 5, 2018 23:33:57 GMT
Surely it’s possible to reverse a 10 minute service in the platform at Baker Street. For years and years the H&C used to reverse 8tph in the single bay platform at Barking. It just requires a prompt turnaround. If it were, we'd be doing it! A bay platform is designed for reversing. A single through running platform with a shunt move is not, they are entirely different. Shunts, as at Baker Street, involve moves that interfere with one another. Bay platform reverses, as at Tower Hill or Barking do not. Something doesn't add up here. Reversing off the platform at Baker Street doesn't require any shunt moves; straight into platform 6 on the west, stop at MB28 and shut down. After changing ends, wrong-road starter MB18 allows the train to return east via 32 points. A reversal is also possible via platform 2, using wrong-road starter MB15 and again reversing east via 32 points (although this of course impinges onto the Met service). Neither of these moves "interfere with each other", certainly no more so than normal junction working through Baker Street (excluding the fact that you wouldn't want a train sat in 2 for long). It *is* possible to reverse a 10 minute service at Baker Street... and that's exactly what's being done. Every 20 minutes High Street-Baker and every 20 minutes Barking-Baker, which combine to form... yeah, you guessed it. A 10 minute headway between Liverpool Street-Baker. It should be noted that a similar service level is provided when reversals at King's Cross happen via both east to west via the scissors crossover or shunting west to east and over just one part of the scissors. I believe the layout is, in fact, capable of offering more than this. "Bay platform reverses...do not [interfere with one another]" is equally a statement that doesn't add up. Whilst it is true that the two examples given are separate from each line, that isn't universally the case, so that makes this sweeping statement rather difficult to correlate with reality. Using just the SSR to keep things simple, the bays at Plaistow and Dagenham East both cause conflicting moves. Numerous other terminal stations and bay platforms do also give conflicting moves for many routes, often worse than those that allegedly exist within your statements. I present Praed Street Junction as exhibit A. Chris M has already hit the nail on the head however with the following comment: It also needs signalling and track layouts that support that level of intensity. Certainly 6tph can be put round via Baker 6 quite easily when no through running is taken place. More is in theory possible with stepping back, although it certainly couldn't handle the full 12tph. High Street Kensington is going to be very busy with all 4 platforms reversing trains. But on the other hand the layout allows District to use platforms 3 and 4 as a terminus with crossovers available from both lines in and out. The same is true of platforms 1 and 2 for circles. So it is an eloquent solution that requires the minimum of alterations to the service on the branches of both Met and District. It is not possible to reverse Outer Rail to Inner Rail at High Street via platform 1, only via platform 2. When posting please at least make some attempt to be factually accurate. 🙄 |
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Post by DistrictSOM on Feb 5, 2018 23:42:12 GMT
Try ED14 shunt signal over 13’s Reverse
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MoreToJack
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Post by MoreToJack on Feb 5, 2018 23:52:58 GMT
Try ED14 shunt signal over 13’s Reverse That would allow you to reverse Inner Rail to Outer Rail after de-training in platform 1 and doing the mainline shunt to platform 2; it wouldn't allow Outer Rail to Inner Rail as no crossovers are provided. It's also not possible to double shunt from platform 2 to platform 1 via 13s (and there'd be no point anyway!).  |
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Post by DistrictSOM on Feb 6, 2018 2:08:05 GMT
look I always have got my inner and outer mixed up why can't it be just east and west bound thats easier
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