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Old 17th July 2008, 02:16 PM   #20 (permalink)
Paul Scott
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Default Fast / Slow Line Layout

allan tracy wrote:
> I don’t think anyone’s mentioned yet that an important consideration
> is the extent to which four tracks are being provided.
>
> Paired by use doesn’t lend itself to sections of railway where, for
> whatever reason, it is necessary to revert to just two tracks. One
> immediately thinks of Hadley Wood Tunnel on the ECML paired by use, on
> aproach to there, would be a nightmare
>
> The LNWR is an interesting example of horses for courses.
>
> Euston to Rugby is paired by use, as four tracks are available
> throughout, yet the Trent Valley line north thereof is paired by
> direction (believe will still be the case after upgrade), due to the
> need to revert to just two tracks at various points.


The new layout of the TV lines once through Rugby will be a little odd, in
that the lines will initially be DF, DS, UF, US, from south to north. The
down lines will switch over to DS, DF by virtue of the single track length
at Brinklow.

So if they ever get that big lottery win and four track that section,
they'll have to unknot the down lines, presumably a straightforward matter
once out of Rugby.

Paul


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