On 24 Apr, 09:04, "Peter Masson" wrote:
The track diagram in the February 2007 MR shows the four tracks using the
diveunder to be the Down Charing Cross Slow, the Down Charing Cross Fast,
the Up Charing Cross (only splits into Fast and Slow at Southwark Park
Junction) and the Down Brighton Slow.

So in summary, from the diagrams Paul sent me, the flyover appears to
create:
- At the north end, a grade separated junction between the BML fasts
and SEML slows onto the Thameslink route
- At the south end, a grade separated junction between the Thameslink
route (BML fasts) and the LB terminus route (BML slows)
- In the middle, a route for the SEML passing underneath the
Thameslink route to get to to Charing Cross (two dedicated tracks plus
the north track)

I don't know whether
there has been any refinement to the layout now that it is envisaged that
Thameslink - SEML trains will run fast towards Tonbridge. However, with 28
tph envisaged in the peaks to/from Charing Cross, the Thameslink - SEML
trains may well have to use the slow lines through New Cross anyway, as
Cannon Street will only have 20 tph of which 6 will go via Greenwich.

That's a very good point. But as long as the crossing move was done
before all the fast trains through Lewisham join the line (ah, so
that's what the Tanner's Hill flydown upgrade is for), it shouldn't be
a big deal.

There'll still be many flat junctions handling 20 tph.

U

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