Glen Brewer Wrote:
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> They may be there, but of what use are they? They
> don't provide shelter from rain, snow or sun.

I'm wondering the same thing. Maybe they are planning to stretch a giant tarp over the hole in the center. But then it would be awfully dark inside.:-)
Actually, it looks like the tubular structures over the platforms will support reversed shed roofs, which will drain in the center (hopefully with drain pipes). You can see one most clearly in the last picture. I am guessing they will add 3 more.
So the big structure is apparently just decoration, which happens to clash with the structures around it, particularly the station. They should paint it black so it is less intrusive.