>>1282571Ok so you'd have 2 main stages (the hashed-out part of stage 1 is just where you'd probably need to have some kind of temporary construction staging)
Current situation: ( _ is a platform, = is tracks)
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>Stage 1Close the southernmost tracks. No more expresses can run on the line while construction takes place. People will accept it if you sell it to them like the level crossing removal.
Where the southernmost line is, you build a platform. The Southern half of the island platform is now demolished and track built where that used to be.
Now we have:
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>Stage 2Shut the northern half of the island platform and also the middle running tracks. Again, we only have 2 tracks operational, so no expresses.
We now demolish the northern half of the island platform and build tracks where that used to be. We also realign the closed middle tracks for better speed through running and loading gauge tolerance.
Voila, we now have four tracks and two platforms:
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