A third track isn't needed, the existing third track from Caulfield should be ripped up for parking or redevelopment.
Express services to Frankston/Morn.Pen. should be run via Dandenong, with the existing line running a proper metro service.
so you mean ZH that
existing pax that have a partial express Frankston to Flinders St (60 minutes),
are now going to be given the "improvement" of an SAS (70 minutes),
just so the lucky few out Mornington can have a fancy express (why do they deserve an express ??) of what 40-50-60 minutes.
and YES, I have been on "proper metro"
Heathrow - Kings Cross - 29km 57 minutes
Kings Cross - Cockfosters - 18km 34 minutes
Total Piccadilly line 47 km 91 minutes
Frankston - Flinders St 44km 60 minutes
Metro are NOT fast, they just seem that way 'cause you're cooped up in a tunnel.
The difference between Melbourne Metro and London Metro is fairly simple.
London trains are small, frequent and not particularity fast. Melbourne are large, not so frequent and mixed (but better) speeds.
As for that Frankston- Dandenong, what are you prepared to pay for it and how many will use it (that do NOT already catch the existing paths)?
20km new track, with no reservation, and maybe use some
of the Eastlink median.
Once you get to the Eastlink/Dandy By-pass intersection: how do you get to Dandy station
- Forget Dandy, just go to Melbourne instead
How many stations ?? NONE ?? so again it's just a junket for Mornington ?
Epping-Mernda 11km cost $1.2B - some infrastructure upgrades sure, but they had an existing pathway.
How much for your pet project?
And don't give the usual tripe about expresses slow everything down. In that case Mornington must not get one either.