On Wednesday morning, at aboutn 9.50a.m. there was some sort of
Victoria Line problem on the Northbound line into Victoria - according
to a station announcer a train was due to "come out of a siding"
(somewhere between Victoria and Pimlico?) to be the next Northbound
train but there was a signal problem, and the line became blocked.

So, for some reason the next Southbound train to arrive at Victoria was
terminated at Victoria, and all of us waiting on the Northbound
platform were directed onto that train. The train was evacuated of
angry Southbound passengers, the train sealed, carriage by carriage,
and then re-opened carriage by carriage for Northbound passengers to
board, all watched by furious Southbound passengers who then had to
wait on the platform. The driver changed ends and we all sat patiently
for a few minutes.

Then came an announcement that they could not get the signal to allow
that train to leave the Southbound platform in a Northerly direction. I
spoke to the driver, who confirmed that "I can't get the signal".

Then the train was evacuated for a second time, and both platforms then
became full of Northbound and Southbound passengers nicely mixed up!

A few minutes later came the announcement that "All Victoria Line
services are now suspended". There was then the inevitable mass exodus
of several hundred passengers angrily looking for other means of
transport at about 10.15a.m.

Two questions for those "in the know":

1. Was it inevitable that there would be difficulty in the Southbound
train trying to travel North out of the Southbound platform? For
example, maybe this was impossible because the next following
Southbound train was in block and therefore preventing any other train
from "reversing" into its block, even if only to use the cross-over to
the Northbound? If so, why did they even attempt to do so?

2. How on Earth could such a localised problem on a section South of
Victoria effectively paralyse the entire line in both directions?
Aren't there procedures in place to allow, for example (as presumably
was attempted here), turning trains at Victoria and then continuing a
Victoria - Walthamstow service, cutting out the Brixton section?

For all I know, the problem may have been rectified within minutes (it
certainly was by the time I arrived at Highbury an hour later, by bus),
but, never mind terrorist alerts, there seems a tendency to shut down
the entire line at the drop of a hat.

Marc.

In article .com,
" writes
On Wednesday morning, at aboutn 9.50a.m. there was some sort of
Victoria Line problem on the Northbound line into Victoria - according
to a station announcer a train was due to "come out of a siding"
(somewhere between Victoria and Pimlico?)

At the south end of Victoria station.

to be the next Northbound
train but there was a signal problem, and the line became blocked.

Sounds like something prevented the points being restored to face the
northbound running line while, at the same time, preventing anything
coming out of the sidings. Offhand I can't see how a single failure
could cause that, but that may just be lack of imagination on my part.

So, for some reason the next Southbound train to arrive at Victoria was
terminated at Victoria, and all of us waiting on the Northbound
platform were directed onto that train.

Good thinking on someone's part. At this point you can't allow any more
trains north from Pimlico. So, unless you want to leave passengers in
tunnels for an unknown length of time, you're limited to 8 trains in
total south of Victoria (there being 4 stations with 2 platforms each).
Since it is possible to run the line as if Victoria was the southern
terminus, that would at least keep the service running.

The train was evacuated of
angry Southbound passengers, the train sealed, carriage by carriage,
and then re-opened carriage by carriage for Northbound passengers to
board, all watched by furious Southbound passengers who then had to
wait on the platform.

How would you do it without even more confusion?

Then came an announcement that they could not get the signal to allow
that train to leave the Southbound platform in a Northerly direction. I
spoke to the driver, who confirmed that "I can't get the signal".

Oh dear oh dear. Not a good day. Presumably the reversing crossover
failed in some way.

A few minutes later came the announcement that "All Victoria Line
services are now suspended".

Predictable.

1. Was it inevitable that there would be difficulty in the Southbound
train trying to travel North out of the Southbound platform?

No.

For
example, maybe this was impossible because the next following
Southbound train was in block and therefore preventing any other train
from "reversing" into its block, even if only to use the cross-over to
the Northbound?

The following train would be stopped at the previous signal or block
post, which would be before the crossovers. So I don't see that as an
explanation.

2. How on Earth could such a localised problem on a section South of
Victoria effectively paralyse the entire line in both directions?

See above. It wasn't one localised problem, it was two separate
problems.

Aren't there procedures in place to allow, for example (as presumably
was attempted here), turning trains at Victoria and then continuing a
Victoria - Walthamstow service, cutting out the Brixton section?

Yes, which is what you've described happening! It's just that those also
failed.

For all I know, the problem may have been rectified within minutes (it
certainly was by the time I arrived at Highbury an hour later, by bus),

It's possible that the line was cut back to Warren Street - Walthamstow;
IIRC, Warren Street is the next crossover back.

--
Clive D.W. Feather | Home:
Tel: +44 20 8495 6138 (work) | Web: http://www.davros.org
Fax: +44 870 051 9937 | Work:
Please reply to the Reply-To address, which is:

Clive D. W. Feather wrote:
It's possible that the line was cut back to Warren Street - Walthamstow;
IIRC, Warren Street is the next crossover back.

Thank god the builders of the JLE had the forsight to put in lots of
crossovers so the nonense we have to put up with on other lines
whereby huge swathes of the line is closed simply because of
a lack of crossovers to reverse trains at is mitigated. I sometimes
wonder if it was lack of money or lack of foresight that caused
so few to be built in the underground sections of tube lines and
in cases where there was deliberate removal of them such as at
Covent Garden on the piccadilly and Archway on the northern,
whether just plain stupidity was involved.

B2003

In article .com,
Boltar wrote:
Thank god the builders of the JLE had the forsight to put in lots of
crossovers so the nonense we have to put up with on other lines
whereby huge swathes of the line is closed simply because of
a lack of crossovers to reverse trains at is mitigated. I sometimes
wonder if it was lack of money or lack of foresight that caused
so few to be built in the underground sections of tube lines and
in cases where there was deliberate removal of them such as at
Covent Garden on the piccadilly and Archway on the northern,
whether just plain stupidity was involved.

In those cases, it was cost cutting. It's cheaper to maintain
'plain' line than a set of points. I understand the LuL is reversing
this, because they've realized that the operational flexability is
worth the cost.

However, the Archway still has a reversing siding - I was annoyed the other
day when the train that would have taken me to the delights of Church End
reversed there.

--
RIP Morph (1977-2005)

On Fri, 25 Nov 2005, Boltar wrote:

Clive D. W. Feather wrote:

It's possible that the line was cut back to Warren Street - Walthamstow;
IIRC, Warren Street is the next crossover back.

Thank god the builders of the JLE had the forsight to put in lots of
crossovers so the nonense we have to put up with on other lines whereby
huge swathes of the line is closed simply because of a lack of
crossovers to reverse trains at is mitigated.

It's certainly a good thing that the JLE is built to a high level of
flexibility, but the Victoria line, which is what we were talking about
here, isn't actually that bad: you can reverse at Victoria, Warren Street,
King's Cross, Highbury & Islington and Seven Sisters, five out of the
line's sixteen stations!

Hmm. Can you actually reverse at H&I? There's a connection that should
allow it, according to the maps, but i've never heard of it happening.

And can you reverse in both directions at Victoria, Warren Street and
Seven Sisters? Again, the tracks would allow it, but what about the
signalling? Or is it all done manually?

tom

--
I content myself with the Speculative part [...], I care not for the
Practick. I seldom bring any thing to use, 'tis not my way. Knowledge
is my ultimate end. -- Sir Nicholas Gimcrack

On Sat, 26 Nov 2005 03:25:25 +0000, Tom Anderson
wrote:

On Fri, 25 Nov 2005, Boltar wrote:

Clive D. W. Feather wrote:

It's possible that the line was cut back to Warren Street - Walthamstow;
IIRC, Warren Street is the next crossover back.

Thank god the builders of the JLE had the forsight to put in lots of
crossovers so the nonense we have to put up with on other lines whereby
huge swathes of the line is closed simply because of a lack of
crossovers to reverse trains at is mitigated.

It's certainly a good thing that the JLE is built to a high level of
flexibility, but the Victoria line, which is what we were talking about
here, isn't actually that bad: you can reverse at Victoria, Warren Street,
King's Cross, Highbury & Islington and Seven Sisters, five out of the
line's sixteen stations!

Hmm. Can you actually reverse at H&I? There's a connection that should
allow it, according to the maps, but i've never heard of it happening.

Reversal at Highbury certainly is done - usually if the line is
suspended due to an incident south of there.

And can you reverse in both directions at Victoria, Warren Street and
Seven Sisters? Again, the tracks would allow it, but what about the
signalling? Or is it all done manually?

Victoria is principally a south to north reversal - either via the
sidings to the south or the crossover. In theory you could run a train
north out of the n/b and reverse back over the crossover into the s/b
but I've never heard of that being done.

Warren St is south to north. I've never heard of it being done in the
reverse direction.

Seven Sisters - typically north to south via the sidings / depot road.
If a train fails in the s/b platform they can and do reverse it back
into the sidings. You can't head south from the central terminating
platform, only to the depot / sidings. I've also never heard of a n/b
train having left the Walthamstow platform, heading north and then
reversing back into the central terminating track at Seven Sisters.

Whether the "rare" moves are prevented by the signalling set up I simply
don't know.
--
Paul C


Admits to working for London Underground!

Paul Corfield wrote:
Seven Sisters - typically north to south via the sidings / depot road.
If a train fails in the s/b platform they can and do reverse it back
into the sidings. You can't head south from the central terminating

Just out of curiousity , how far do the sidings at Brixton go? I've heard
the tunnel goes halfway to streatham (urban myth perhaps?) but how far
does the track go? Can you fit many trains down there or is it used for
storage of some sort?

B2003

In article ,
(Paul Corfield) wrote:

And can you reverse in both directions at Victoria, Warren Street
and Seven Sisters? Again, the tracks would allow it, but what about
the signalling? Or is it all done manually?

Victoria is principally a south to north reversal - either via the
sidings to the south or the crossover. In theory you could run a train
north out of the n/b and reverse back over the crossover into the s/b
but I've never heard of that being done.

Victoria was built with a scissors crossover at the North end, wasn;t
it? Why on earth did they remove it?

--
Colin Rosenstiel

On Sat, 26 Nov 2005, Paul Corfield wrote:

On Sat, 26 Nov 2005 03:25:25 +0000, Tom Anderson
wrote:

And can you reverse in both directions at Victoria, Warren Street and
Seven Sisters?

[snipped]

Whether the "rare" moves are prevented by the signalling set up I simply
don't know.

Fair enough. Cheers for the info!

tom

--
This should be on ox.boring, shouldn't it?

In article , Tom
Anderson writes
And can you reverse in both directions at Victoria, Warren Street and
Seven Sisters? Again, the tracks would allow it, but what about the
signalling?

From the diagram that Tubeprune posted, you can do it at Victoria: for
north-to-south, run north out of the platform to behind VF16, then
reverse into the southbound platform.

Going to his site: you can do it at Warren Street. For north-to-south,
run north out of the platform to behind VG8, then reverse into the
southbound platform. For south-to-north, simply run directly over the
crossover when given the road by VG4.

Seven Sisters: you can only do south-to-north from platform 4. Either:
* no route indicator at VL6, forward to VL7, change ends, signal VL20
takes you over the scissors to VL19 which protects the entrance to
the southbound platform.
* right-hand indicator at VL6, forward over the crossover to a fixed red
light behind VL22A, change ends, signals VL22A and VL22B take you
straight to VL19.

North-to-south is harder but possible: into platform 5, change ends,
signal VL8 takes you on to the depot exit road, over the scissors, and
up to VL7. Change ends again, pass VL20 at danger with permission[*]
and run forward to the fixed red light at the end of platform 4. Change
ends a final time and depart normally (VL6 with left-hand junction
indicator).
[*] VL20 is not shown as having a junction indicator. I'm assuming,
therefore, that the only route from it leads to VL19. It could be,
however, that the only route leads to platform 4. In which case the
first of my south-to-north cases doesn't apply and north-to-south
involves all signalled moves.

--
Clive D.W. Feather | Home:
Tel: +44 20 8495 6138 (work) | Web: http://www.davros.org
Fax: +44 870 051 9937 | Work:
Please reply to the Reply-To address, which is: