In message , at 10:05:13 on Fri, 27
Mar 2009, tim..... remarked:
They do seem rather fixated on how "low demand" at the inner stations
would drag down the business case for other improvements. Quite why
Stansted Airport needs 6 trains an hour I do not know.

Because the current trains are running full.

And a train can only take the passengers for about four planes. With the
latter landing or taking off every two minutes, do the math.
--
Roland Perry

"Peter Masson" wrote in message
...

"plcd1" wrote

Anyone understand why signalling alterations are required for
overnight services?

Presumably bidirectional signalling, to make single line working
practicable
while the other line is under maintenance.


Nice idea, except that HSE rules don't allow such operations.

tim

"tim....." wrote
"Peter Masson" wrote

Presumably bidirectional signalling, to make single line working
practicable while the other line is under maintenance.

Nice idea, except that HSE rules don't allow such operations.

No such rule applies between Northallerton and Newcastle, where late-night
passenger trains regularly run 'wrong line' under SIMBIDS.

Roland Perry wrote:
In message , at 10:05:13 on Fri, 27
Mar 2009, tim..... remarked:
They do seem rather fixated on how "low demand" at the inner
stations would drag down the business case for other improvements. Quite
why Stansted Airport needs 6 trains an hour I do not know.

Because the current trains are running full.

And a train can only take the passengers for about four planes. With
the latter landing or taking off every two minutes, do the math.

Three and three-quarter trains per hour could carry everyone?

In message , at 11:37:44 on Fri, 27
Mar 2009, John Rowland
remarked:
And a train can only take the passengers for about four planes. With
the latter landing or taking off every two minutes, do the math.

Three and three-quarter trains per hour could carry everyone?

Now add the expected 50% increase.
--
Roland Perry

Roland Perry wrote:
In message , at 11:37:44 on Fri,
27 Mar 2009, John Rowland
remarked:
And a train can only take the passengers for about four planes. With
the latter landing or taking off every two minutes, do the math.

Three and three-quarter trains per hour could carry everyone?

Now add the expected 50% increase.

Since the M11, A120 and the trains from Stansted to Cambridge carry a fair
number of people, I would think there would still be enough room.

On 27 Mar, 09:34, plcd1 wrote:
I am very surprised by this. I fail to see how they can get 4 tracks
in the alignment immediately south of Tottenham Hale. You have Ferry
Lane estate on one side and industrial and residential units including
the retail park on the other.

The line used to be have more tracks on its east side and most of the
alignment is untouched. Have a look on Google Maps and there's space
for four tracking most of the way to Zone 6, with only a few
obstacles. The area south of Tottenham Hale is clear with the
exception of the bridge under the Goblin, where the second span has
been half-inched by a new road, which would obviously need to be dealt
with.

U

In message , at 11:57:47 on Fri, 27
Mar 2009, John Rowland
remarked:
And a train can only take the passengers for about four planes. With
the latter landing or taking off every two minutes, do the math.

Three and three-quarter trains per hour could carry everyone?

Now add the expected 50% increase.

Since the M11, A120 and the trains from Stansted to Cambridge carry a fair
number of people, I would think there would still be enough room.

Apparently the trains are full at the moment, so the approximations we
are discussing nevertheless have some "pinch points" that need relief.
--
Roland Perry

Roland Perry wrote:
In message , at 11:57:47 on Fri,
27 Mar 2009, John Rowland
remarked:
And a train can only take the passengers for about four planes.
With the latter landing or taking off every two minutes, do the
math.

Three and three-quarter trains per hour could carry everyone?

Now add the expected 50% increase.

Since the M11, A120 and the trains from Stansted to Cambridge carry
a fair number of people, I would think there would still be enough
room.

Apparently the trains are full at the moment, so the approximations we
are discussing nevertheless have some "pinch points" that need relief.

As soon as the stasi have finished arresting all the train spotters and
plane spotters, 4tph will be sufficient...

"John Salmon" wrote in message
...
"tim....." wrote
"Peter Masson" wrote

Presumably bidirectional signalling, to make single line working
practicable while the other line is under maintenance.

Nice idea, except that HSE rules don't allow such operations.

No such rule applies between Northallerton and Newcastle, where late-night
passenger trains regularly run 'wrong line' under SIMBIDS.

I was referring to the bit about working on an adjacent line.

tim