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| London Transport (uk.transport.london) Discussion of all forms of transport in London. |
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#1
November 18th 12, 08:45 PM
posted to uk.railway,uk.transport.london
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Ultimate signaling balls up at London Bridge
On Nov 17, 11:51*pm, djxc6 wrote:
Harldy and "ultimate" problem. Actually one of the *ultimate* signalling difficulties - if not the UK all time ultimate difficulty - would occur about 1 km to the west of London Bridge where it is possible to grid lock Borough Market Junction triangle with three 12car trains in the wrong place ... the layout is such that the rear of each one of the three trains obstructs the route of another ... and it is not just the route is locked but track unoccupied, it is the rear of the train is literally on the tracks in front of another. -- Nick |
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#2
November 18th 12, 09:04 PM
posted to uk.railway,uk.transport.london
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Ultimate signaling balls up at London Bridge
"D7666" wrote in message ... Actually one of the *ultimate* signalling difficulties - if not the UK all time ultimate difficulty - would occur about 1 km to the west of London Bridge where it is possible to grid lock Borough Market Junction triangle with three 12car trains in the wrong place ... the layout is such that the rear of each one of the three trains obstructs the route of another ... and it is not just the route is locked but track unoccupied, it is the rear of the train is literally on the tracks in front of another. No longer possible. There is no pointwork at Borough Market Junction any more - London Bridge platforms 4, 5, and 6 and the Up Passenger Loop only lead to/from Metropolitan Junction (thence Charing Cross or Blackfriars) while platforms 1, 2, and 3 only lead to Cannon Street. Peter |
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#3
November 18th 12, 09:38 PM
posted to uk.railway,uk.transport.london
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Ultimate signaling balls up at London Bridge
On Nov 18, 10:04*pm, "Peter Masson"
wrote: "D7666" *wrote in message ... Actually one of the *ultimate* signalling difficulties - if not the UK all time ultimate difficulty - *would occur about 1 km to the west of London Bridge where it is possible to grid lock Borough Market Junction triangle with three 12car trains in the wrong place ... the layout is such that the rear of each one of the three trains obstructs the route of another ... and it is not just the route is locked but track unoccupied, it is the rear of the train is literally on the tracks in front of another. No longer possible. There is no pointwork at Borough Market Junction any more - London Bridge platforms 4, 5, and 6 and the Up Passenger Loop only lead to/from Metropolitan Junction (thence Charing Cross or Blackfriars) while platforms 1, 2, and 3 only lead to Cannon Street. Peter |
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#4
November 18th 12, 09:39 PM
posted to uk.railway,uk.transport.london
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Ultimate signaling balls up at London Bridge
On Nov 18, 10:04*pm, "Peter Masson"
wrote: "D7666" *wrote in message ... Actually one of the *ultimate* signalling difficulties - if not the UK all time ultimate difficulty - *would occur about 1 km to the west of London Bridge where it is possible to grid lock Borough Market Junction triangle with three 12car trains in the wrong place ... the layout is such that the rear of each one of the three trains obstructs the route of another ... and it is not just the route is locked but track unoccupied, it is the rear of the train is literally on the tracks in front of another. No longer possible. There is no pointwork at Borough Market Junction any more - London Bridge platforms 4, 5, and 6 and the Up Passenger Loop only lead to/from Metropolitan Junction (thence Charing Cross or Blackfriars) while platforms 1, 2, and 3 only lead to Cannon Street. I admit to not studying the current layout ... but I am under the impression it is still possible to create a gridlock somewhere around there. -- Nick |
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#5
November 18th 12, 09:51 PM
posted to uk.railway,uk.transport.london
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Ultimate signaling balls up at London Bridge
On Nov 18, 10:39*pm, D7666 wrote:
No longer possible. There is no pointwork at Borough Market Junction any more - London Bridge platforms 4, 5, and 6 and the Up Passenger Loop only lead to/from Metropolitan Junction (thence Charing Cross or Blackfriars) while platforms 1, 2, and 3 only lead to Cannon Street. I admit to not studying the current layout ... but I am under the impression it is still possible to create a gridlock somewhere around there. Cambria / Loughborough / CanterburyRd Jn.s ? I'm sure its got something to do with ECS moves on one side of the triangle, perhaps I was thinking of the west side of the Borough market triangle which is ECS only instead of the west side of that one, which is also ECS only, and both curves take 12car ECS (actually the same ECS trains). -- Nick |
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#6
November 19th 12, 07:20 AM
posted to uk.railway,uk.transport.london
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Ultimate signaling balls up at London Bridge
On Nov 18, 10:51*pm, D7666 wrote:
On Nov 18, 10:39*pm, D7666 wrote: No longer possible. There is no pointwork at Borough Market Junction any more - London Bridge platforms 4, 5, and 6 and the Up Passenger Loop only lead to/from Metropolitan Junction (thence Charing Cross or Blackfriars) while platforms 1, 2, and 3 only lead to Cannon Street. I admit to not studying the current layout ... but I am under the impression it is still possible to create a gridlock somewhere around there. Cambria / Loughborough / CanterburyRd Jn.s ? I'm sure its got something to do with ECS moves on one side of the triangle, perhaps I was thinking of the west side of the Borough market triangle which is ECS only instead of the west side of that one, which is also ECS only, and both curves take 12car ECS (actually the same ECS trains). I'm still trawling the grey cells for this, I'm sure there is one in the south eastern area and it involves ECS and/or 12car trains. Borough Market is clearly wrong, not sure what brain glitch caused me to write that. -- Nick |
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#7
November 19th 12, 07:31 AM
posted to uk.railway,uk.transport.london
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Ultimate signaling balls up at London Bridge
"D7666" wrote in message ... On Nov 18, 10:51 pm, D7666 wrote: On Nov 18, 10:39 pm, D7666 wrote: No longer possible. There is no pointwork at Borough Market Junction any more - London Bridge platforms 4, 5, and 6 and the Up Passenger Loop only lead to/from Metropolitan Junction (thence Charing Cross or Blackfriars) while platforms 1, 2, and 3 only lead to Cannon Street. I admit to not studying the current layout ... but I am under the impression it is still possible to create a gridlock somewhere around there. Cambria / Loughborough / CanterburyRd Jn.s ? I'm sure its got something to do with ECS moves on one side of the triangle, perhaps I was thinking of the west side of the Borough market triangle which is ECS only instead of the west side of that one, which is also ECS only, and both curves take 12car ECS (actually the same ECS trains). I'm still trawling the grey cells for this, I'm sure there is one in the south eastern area and it involves ECS and/or 12car trains. Borough Market is clearly wrong, not sure what brain glitch caused me to write that. -- Nick Streatham Junction South was the easiest place for a signaller to lock themself up with the Vic to LB rounders via Wimbledon. |
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#8
November 19th 12, 07:27 AM
posted to uk.railway,uk.transport.london
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Ultimate signaling balls up at London Bridge
On Nov 18, 11:39*pm, D7666 wrote:
On Nov 18, 10:04*pm, "Peter Masson" wrote: "D7666" *wrote in message ... Actually one of the *ultimate* signalling difficulties - if not the UK all time ultimate difficulty - *would occur about 1 km to the west of London Bridge where it is possible to grid lock Borough Market Junction triangle with three 12car trains in the wrong place ... the layout is such that the rear of each one of the three trains obstructs the route of another ... and it is not just the route is locked but track unoccupied, it is the rear of the train is literally on the tracks in front of another. No longer possible. There is no pointwork at Borough Market Junction any more - London Bridge platforms 4, 5, and 6 and the Up Passenger Loop only lead to/from Metropolitan Junction (thence Charing Cross or Blackfriars) while platforms 1, 2, and 3 only lead to Cannon Street. I admit to not studying the current layout ... but I am under the impression it is still possible to create a gridlock somewhere around there. I'm tempted to suggest that gridlock is the routine state of the lines around that part of the world every morning peak, but I know that's not quite what you had in mind. Robin |
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