On Aug 14, 11:14 pm, somersetchris somersetchris.
wrote:
There will be a flat junction at Dalston which will have the lines from
Stratford and the ELL meeting.

One flat junction.

There will also be a flat junction so both of these lines can access
both number 1 and 2 lines through Highbury & Islington.

Two flat junctions.

send the trains via Canonbury tunnel to Finsbury Park

Three flat junctions.

And the first flat junction is on the two track bottleneck, whereas a
direct ELL to Number 2 lines connection (to reach Highbury) requires a
single flat junction that only conflicts with trains on the Number 2
lines.

(Of course trains to Finsbury Park could use the same connection, but
then they'd need a fourth flat junction to join the Number 1 lines,
resulting in the same number of conflicts. You can't win)

U

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