I've added further to my earlier post which you may care to comment on.
Since we're all off in fantasy land, I'll post here what I was tinkering with down in Armchair Operators, *my* grand scheme for the one prosperous populous future Sydney.
Funded by cancelling the Western Metro, there are three main elements:
- Western Express - with 240m platforms
- Eastern Express - with 200m platforms
- Inner West Extension to Olympic Park and (optionally) to Rhodes
There are two Outer Suburban systems, operated by NIFs or something similar (Orange and Green). There is an S-Bahn type system over the SHB in the current format (yellow), and a short haul system via the airport (aqua) as well as the Metro (pink), which is a mix of all three. T4 ignored for simplicity.
Orange Line: Penrith and Richmond to Parramatta, then all trains express non-stop to Central in 15 min, then Wyngaroo Hall (about 18 min).
Green Line: Campbelltown & Sydney Airport 2 to Revesby, then express (also about 15 minutes non stop) to Central, St James and maybe Bridge St.
Yellow Line: Glenfield via Granvile and Hornsby via Eastwood feed into the SHB line. One of those two terminates at Nth Sydney, or maybe a new turnback at St Leonards.
Aqua Line: Olympic Park (Half Pattern, other half terminate at Homebush or proceed over new flyover to Rhodes on a segregated mostly single track sector) - City Circle - Airport - all to Reveseby.
Pink Line: The bloody metro.
HR Support routes:
Glenfield to Parramatta. A much reduced Cumberland line, a feeder for the Orange Line
Liverpool to Bankstown express. A metro feeder route
Lidcombe to Bankstown Shuttle. Another Metro feeder route
Cabramatta to Bankstown milk run.
Parramatta to Bankstown shuttle (1/4 pattern)
Hornsby to Strathfield. It's intended as a feeder for the metro at Epping, as Hornsby via Eastwood only gets a half yellow pattern.
These routes serviced by 4 car trains, or something smaller and cheaper anyway.
With regard to your above post, I regret to say that it truly belongs in fantasyland. I can't even begin to respond to your suggestions as they are totally implausible.
However, getting back to T4 and SCO which is the subject of this thread, the scenario for future operation on this sector which I have suggested is a realistic assessment of what is likely to happen and certainly doesn't belong in the fantasyland category.
There is a clear intention to separate SCO services from the T4 all stations services and I would interpret that to specifically mean the sector between Wolli Creek and Erskineville. SCO would still share the common express corridor with T4 between Hurstville and Wolli Creek, but switched to the Local instead of the current Main, with the T4 express services crossing over to the Main at Wolli Creek and the SCO services continuing on the Local to the Illawarra Dive to Sydney Terminal. Otherwise, what is the point of the new Hurstville crossover if the SCO services continue to run in a mixed pattern between Wolli Creek and Erskineville on the Illawarra Main, whether they proceed to Bondi Junction or Sydney Terminal?
The other point which you and others are missing, is that South Regional and Intercity trains would be able to cross from the Illawarra Dive from Sydney Terminal to the Local with a new crossover at Eveleigh, rather than the current operation where they have to share the Main with T4 and SCO services between Erskineville and Sydenham, before crossing over to the Local to access the East Hills Line express tracks.
I would expect that ultimately the Illawarra Local will become the express tracks between Hurstville and Redfern for SCO and T8 services via Sydenham, with intermediate stations like Tempe, St Peters and Erskineville being serviced exclusively by enhanced all stations T4 services from Wolli Creek to Bondi Junction. That's not fantasy, but the reality.