by The EGE
The existing island platform is pretty skinny - a side platform wouldn't save enough space for 4 tracks. There was a study a while back (I can't find it now) for widening the whole ROW to 4 tracks and it was obscenely expensive. Cut-and-covering the entire Orange Line from before Back Bay to Forest Hills would probably be cheaper.
I believe they are actually planning to repair the platform, although that is not part of the new platform project.
I believe they are actually planning to repair the platform, although that is not part of the new platform project.