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Clive D.W. Feather · September 15th 16, 08:28 AM posted to uk.railway,uk.transport.london

On 14/09/2016 18:23, wrote:
I notice that the starter at SPILL has a D theatre-light indication.
Does that indicate down?

It will mean "track D". What "track D" means will depend on the
location, and I don't have data for SPILL.

Very likely it means "Down Line", with "U" used if the train is being
switched to the Up Line. But if this is the northbound platform, it
might be some way of distinguishing Kentish Town from Finsbury Park. Or
something else.

The lines out of Euston are labelled A to E and every signal from Euston
to Camden Junction displays the letter of the line the train will be on
at the next signal, even if there's no choice.

While no example comes to mind immediately, I'm sure there is at least
one place where "D" is the initial of the destination. If the line
speeds were lower, Colton Junction could have used "D" for Doncaster and
"L" for Leeds.

[email protected] · September 15th 16, 02:23 PM posted to uk.railway,uk.transport.london

On 15.09.16 9:28, Clive D.W. Feather wrote:
On 14/09/2016 18:23, wrote:
I notice that the starter at SPILL has a D theatre-light indication.
Does that indicate down?

It will mean "track D". What "track D" means will depend on the
location, and I don't have data for SPILL.

Very likely it means "Down Line", with "U" used if the train is being
switched to the Up Line.

I believe the theatre lamps on SPILL Down indicate an X when crossing over.

But if this is the northbound platform, it
might be some way of distinguishing Kentish Town from Finsbury Park. Or
something else.

Possibly.

The lines out of Euston are labelled A to E and every signal from Euston
to Camden Junction displays the letter of the line the train will be on
at the next signal, even if there's no choice.

I'm not sure that I understood that?

Charles Ellson[_2_] · September 15th 16, 06:54 PM posted to uk.railway,uk.transport.london

On Thu, 15 Sep 2016 15:23:41 +0100, "
wrote:

On 15.09.16 9:28, Clive D.W. Feather wrote:
On 14/09/2016 18:23, wrote:
I notice that the starter at SPILL has a D theatre-light indication.
Does that indicate down?

It will mean "track D". What "track D" means will depend on the
location, and I don't have data for SPILL.

Very likely it means "Down Line", with "U" used if the train is being
switched to the Up Line.

I believe the theatre lamps on SPILL Down indicate an X when crossing over.

But if this is the northbound platform, it
might be some way of distinguishing Kentish Town from Finsbury Park. Or
something else.

Possibly.

The lines out of Euston are labelled A to E and every signal from Euston
to Camden Junction displays the letter of the line the train will be on
at the next signal, even if there's no choice.

I'm not sure that I understood that?

IIRC you will get successive signals on Camden Bank with no
intervening points thus no opportunity to change route.

Clive D.W. Feather · September 15th 16, 09:52 PM posted to uk.railway,uk.transport.london

On 15/09/2016 16:23, wrote:
Very likely it means "Down Line", with "U" used if the train is being
switched to the Up Line.
I believe the theatre lamps on SPILL Down indicate an X when crossing over.

Quite possibly. X is the standard notation for running "wrong line".

The lines out of Euston are labelled A to E and every signal from Euston
to Camden Junction displays the letter of the line the train will be on
at the next signal, even if there's no choice.

I'm not sure that I understood that?

Each line between Euston and Camden is lettered A to E.

A train departing Euston will pass 5 or 6 signals, including the
platform starter, in that length. Every one of those signals has a
theatre indicator showing one of those letters. This includes
straight-ahead routes and, in particular, includes those signals that
have no facing points before the next signal.

Consider the following (simplified) layout:

|-O 101 |-O 105
----------------*---------------- line A
|-O 203 \ |-O 207
------------------*-------------- line B

In a traditional layout (say the lines into and out of London Bridge):

101 to 105: plain signal, no theatre or feather
101 to 207: number 4 feather or theatre "B"
203 to 207: plain signal, no theatre or feather

Euston-style layout:

101 to 105: theatre "A"
101 to 207: theatre "B"
203 to 207: theatre "B"

Anna Noyd-Dryver · September 16th 16, 09:43 PM posted to uk.railway,uk.transport.london

Clive D.W. Feather wrote:
On 14/09/2016 18:23, wrote:
I notice that the starter at SPILL has a D theatre-light indication.
Does that indicate down?

It will mean "track D". What "track D" means will depend on the
location, and I don't have data for SPILL.

Very likely it means "Down Line", with "U" used if the train is being
switched to the Up Line. But if this is the northbound platform, it
might be some way of distinguishing Kentish Town from Finsbury Park. Or
something else.

The lines out of Euston are labelled A to E and every signal from Euston
to Camden Junction displays the letter of the line the train will be on
at the next signal, even if there's no choice.

This no-longer appears to be the standard as its not being implemented like
that in the forthcoming Cardiff Central resignalling.

While no example comes to mind immediately, I'm sure there is at least
one place where "D" is the initial of the destination. If the line
speeds were lower, Colton Junction could have used "D" for Doncaster and
"L" for Leeds.

Later this year, Line D will be one of the lines through Cardiff Central
(some of the others being A B C and E).

Anna Noyd-Dryver

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