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Hi Kristopher,
Thanks for the background narrative. This is always a good idea to have when a layout is started because it explains the whole purpose and justification for the layout being built if it was in real life, so absolutely on track there - your story is good.
Many real railways evolved in some way over time with connections being added or removed or layout adjustments being necessary due to increased traffic or new operational requirements and this often necessitated changes to track layouts - as your narrative describes.
In reality, the overseeing design engineer would be presented with surveys of a location and details of new operational requirements (among other information) and their task would be to design a layout within the confines of the available space that met the operational requirements.
At the risk of overstaying my welcome on this topic, such changes would all be subject to regulations, so for example, if the original layout was a single track and a platform through a cutting and the requirement was to put another track through the cutting and have an island platform, the island platform width was still subject to requirements, so if the width of the cutting was insufficient to permit two tracks and an island platform with a minimum width of 12 feet, the platform would not be allowed to be built or it would be single-side only with a fence on one side.
Unfortunately, a narrative wasn't able to override design regulations!
Thanks for the background narrative. This is always a good idea to have when a layout is started because it explains the whole purpose and justification for the layout being built if it was in real life, so absolutely on track there - your story is good.
Many real railways evolved in some way over time with connections being added or removed or layout adjustments being necessary due to increased traffic or new operational requirements and this often necessitated changes to track layouts - as your narrative describes.
In reality, the overseeing design engineer would be presented with surveys of a location and details of new operational requirements (among other information) and their task would be to design a layout within the confines of the available space that met the operational requirements.
At the risk of overstaying my welcome on this topic, such changes would all be subject to regulations, so for example, if the original layout was a single track and a platform through a cutting and the requirement was to put another track through the cutting and have an island platform, the island platform width was still subject to requirements, so if the width of the cutting was insufficient to permit two tracks and an island platform with a minimum width of 12 feet, the platform would not be allowed to be built or it would be single-side only with a fence on one side.
Unfortunately, a narrative wasn't able to override design regulations!