Ah. So the "station box" is just a small shaft from which they can widen the TBM tunnel in each direction for the side platforms, using Sequential Excavation Method or similar. It's an interesting concept. I imagine this solution would also simplify the construction of infill stations in the future.
Seems like these trains are just glorified airport trams, though (broadly, a "medium capacity rail" system) so why are they projecting significantly higher capacity than the monorail options? Obviously the underground alignment is much better than anything BYD is proposing.
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la forme d'une ville change plus vite, hélas! que le coeur d'un mortel...
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