Home |
Search |
Today's Posts |
|
London Transport (uk.transport.london) Discussion of all forms of transport in London. |
Reply |
|
LinkBack | Thread Tools | Display Modes |
#1
|
|||
|
|||
Highly random question about the Hounslow loop
Am i right in thinking that it's normal double track downward from Barnes
in the direction of Richmond and Reading? And thus that Barnes looks like: to Hounslow \ \--------- \ ### \--------- to --------------- Clapham Junction ### --------------- to Richmond Doesn't that mean that local services via Richmond have to share with mainline services to Reading? Doesn't that suck? Or is the Reading service not a 'real' main line? Thanks, tom -- For one thing at least is almost certain about the future, namely, that very much of it will be such as we should call incredible. -- Olaf Stapledon |
#2
|
|||
|
|||
Highly random question about the Hounslow loop
"Tom Anderson" wrote in message
... Am i right in thinking that it's normal double track downward from Barnes in the direction of Richmond and Reading? And thus that Barnes looks like: to Hounslow \ \--------- \ ### \--------- to --------------- Clapham Junction ### --------------- to Richmond More Like . . Hounslow ~BARNES~ \ \ \ \ ##1## \ *---*----------*----- Slow \ / \ \ UP X --*----------*--- Fast / \ / ##2## ---*---+-- Clapham Junction \ ##3## ---*-----*-*------------*--- Fast \ \ / DOWN --------*--------*----- Slow ##4## Richmond Doesn't that mean that local services via Richmond have to share with mainline services to Reading? Doesn't that suck? Or is the Reading service not a 'real' main line? The Reading Fasts usually run on the Down Slow and can thus overtake stoppers going to Richmond or Hounslow, and additionally are able to traverse Barnes Junction in parallel with the Hounslows without conflict. Not sure which line UP Fast trains use habitually, but the Slow could be used if a parallel movement is coming off the Houslow line. The timetable is a compromise. On the shared sections west of Barnes, the Stopping trains have to precede the Fasts by a margin equal to the normal platfrom reoccupation time plus the difference in running time between the shared sections extremites, perhaps the Stopper turning off at Twickenham or Staines. The difference in running time is the limiting factor on capacity as it effectively freezes out regular parts of the hour that could be used by a more frequent all stopping service. A common problem with this type of service mix is late presentation of a longer distance Fast train at a junction merging with shorter distance Stopping trains. The Stopper is less likely to be delayed on its shorter simpler network, but may be held a minute or 2 due to priority rules. Anything more and it must go or else the local services could start to decay. Now the Fast has to follow it in until the next passing point or diverge. Some Fasts run via the Hounslow loop in the peaks, and for the brief period when there were 4 trains an hour all day to and from Reading, 2 of those ran via Hounslow with some stops in place of Twickenham and Richmond. -- Mark |
#3
|
|||
|
|||
Highly random question about the Hounslow loop
"Mark Townend" wrote in message ... The Reading Fasts usually run on the Down Slow and can thus overtake stoppers going to Richmond or Hounslow, and additionally are able to traverse Barnes Junction in parallel with the Hounslows without conflict. Not sure which line UP Fast trains use habitually, but the Slow could be used if a parallel movement is coming off the Houslow line. Sorry, meant the Fast Richmond trains could use the Up Fast in parallel with a Hounslow Stopper on the Up Slow through Barnes Junction. -- Mark |
#4
|
|||
|
|||
Highly random question about the Hounslow loop
On Wed, 16 Jun 2004, Mark Townend wrote:
"Tom Anderson" wrote in message ... Am i right in thinking that it's normal double track downward from Barnes in the direction of Richmond and Reading? Doesn't that mean that local services via Richmond have to share with mainline services to Reading? Doesn't that suck? Firstly, thanks for the info! The timetable is a compromise. On the shared sections west of Barnes, the Stopping trains have to precede the Fasts by a margin equal to the normal platfrom reoccupation time plus the difference in running time between the shared sections extremites, perhaps the Stopper turning off at Twickenham or Staines. The difference in running time is the limiting factor on capacity as it effectively freezes out regular parts of the hour that could be used by a more frequent all stopping service. I guess that's the answer to the last bit - no, you can't run frequent local services here without screwing over the fast trains. Obvious, i suppose! tom -- Remember when we said there was no future? Well, this is it. |
#5
|
|||
|
|||
Highly random question about the Hounslow loop
|
#6
|
|||
|
|||
Highly random question about the Hounslow loop
"Colin Rosenstiel" wrote in message ... In article , (Mark Townend) wrote: More Like . . Hounslow ~BARNES~ \ \ \ \ ##1## \ *---*----------*----- Slow \ / \ \ UP X --*----------*--- Fast / \ / ##2## ---*---+-- Clapham Junction \ ##3## ---*-----*-*------------*--- Fast \ \ / DOWN --------*--------*----- Slow ##4## Richmond I'm sure the fasts are on the outside from Clapham Junction to Barnes. -- Colin Rosenstiel The line naming doesn't actually match the use between Clapham and Barnes for some reason. The slow lines are indeed the outer pair. Mr Nobody. |
Reply |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
Terror attack "highly likely" | London Transport | |||
Random photos | London Transport | |||
Brixton turning loop | London Transport | |||
No Oyster validators at Hounslow East Eastbound | London Transport | |||
More on Crossrail to Hounslow | London Transport |