If it is proposed that the infrastucture be usable by courier, package and other express freight, I am presuming that this is best done with a separate dedicated freight service, so that a simple central line flyover to connect to the local freight network of the metro area would be all that is required if a project wishes to offer freight carriage slots.
The same flyover could of course support access from the HSR corridor to Express rail corridors that may already be developed or may be developed at a later date. I've been accused of being a Marxist, yet while Harpo's my favourite, it's Groucho I'm always quoting. Odd, that.
