"Maarten Otto" wrote in message
...
On 1 Mar, 09:14, "Graham Harrison"
wrote:
"1501" wrote in message

...
On 1 Mar, 03:01, E27002 wrote:



On Feb 28, 6:39 pm, "Graham Harrison"

wrote:
"Chafford" wrote in message

...

Following last month's announcement on Evergreen 3, Chiltern
Chairman
Adrian Shooter is asking Modern Railways readers what Evergreen 4
should provide. Captain Deltic likes the idea of a 4 track 125mph
electrified railway but reckons that this will have to wait for
Evergreen 5 (and a potential franchise extension to 2026, according
to
the article!)

Comments to Captain Deltic at:

I know new platforms have been added but how much spare capacity does
Marylebone and the approaches have?

Marylebone was designed with, and land purchased for ten platforms.
It was built with tunnels for seven approach tracks and large goods
yards. Most of the spare land has been sold including the never
utilized platform space.

Although eye-wateringly expensive to do; some of that land could
always be repurchased.

================

All of which suggests the answer to my question of how much spare
capacity
does Marylebone actually have is "not a lot".

Why are those additiona platforms needed in the first place when the
solution already exists... http://en.wikipedia.org/wiki/NS_VIRM

Ahhh double deck trains. Would be nice but we have a problem with loading
gauge - to use trains like those would require rebuilding lots of bridges
and tunnels so that the top of the train is far enough from the top of the
tunnel/bridge. Or that's the usual explanation trotted out when the idea
of DD trains appears.

I was also asking about the capacity of the tracks approaching Marylebone.
While DD trains can add capacity without needing to change signaling there
comes a point when (if traffic continues to grow) more trains are required.
How close are the tracks into Marylebone to capacity given existing
signaling etc?