Sydney Metro NW: higher cost than CityRail if no branching (part 2)

The previous post established Sydney Metro NW will have very poor cost per pax metrics (even worse than Sydney Trains!).  We now look at the case if Metro NW also connects an additional branch by taking over the (existing) North Shore rail line tracks between Gordon and Hornbsy as follows:

This will improve cost metrics as follows:





There are also savings on the North Shore line (which as truncated at Gordon), as follows:

OK, so what is the bottom line?  The North Shore line becomes a "Tube-like" all stops short rail line with stations very closely spaced together and covering inner urban catchments like the lower north shore.  In contrast, Sydney Metro becomes a Crossrail-like network, with wide station spacing so that outer suburban job centres are linked up with a rapid transit rail service:

So the future vision for Sydney Metro is "Crossrail" - and not "Tube" (like many currently see it).