Rockbank & Mt. Cottrell.
My parents moved to Melton in 1981, back then, they were told the railway line was due to be electrified in the next few years. They're still waiting.
We still have no commitment from the state government that it will be done in time for Metro 1's opening, I wouldn't at all be surprised to see this get knocked back in favour for something else.
Meanwhile the Western Freeway is still the same 4 lanes it was in 1987.
For a real indictment on planning in Victoria, just take a look at the new suburb of
Thornhill Park within the Rockbank & Mt.Cottrell area. This new suburb is bordered by Paynes Rd to the East, Mt. Cottrell Rd to the West, Western Freeway to the North and the railway line to the South. It has no bus service. It has no railway station and no proper freeway interchange.
Currently, the residents of Thornhill Park have to turn left on to the West-bound lanes of the freeway and drive 5kms to the Ferris Road interchange at Melton to turn back on to the east-bound lanes to head towards Melbourne. A similar move is required to enter Thornhill Park from the West via the Leakes Rd interchange at Rockbank (about 3kms away).
There are no shops in Thornhill Park, nor are there any schools or any other places of employment. If you live there, you will be driving everywhere.
To add insult to injury, the Western Freeway at Thornhill Park has been impacted by ongoing roadworks for the past 2 years, but none of that is too add more lanes, or even to add a proper freeway interchange for either Paynes Rd or Mt. Cottrell Rd. This interchange hasn't even been planned. With that being the case, I can't see how a decent bus service can be provided.
Other parts of the Rockbank area aren't quite as bad off, with a new bus service being announced to be provided to link the new suburbs North of the freeway to the recently upgraded railway station. This will hopefully be only the first with more to come.
As for the trains, when the duplication work has finally opened (January) a 20 minute service to Melton/ Bacchus Marsh should be on the cards (with every 2nd train continuing on to Wendouree giving Ballarat their 40 minute service). This would match the Sunbury line and the Geelong line.
Electrification to Melton needs to happen in time for the opening of the Metro tunnel. This needs to happen with the quadding of most of the line.
Werribee and Tarneit
Werribee to Wyndham Vale needs to be connected up and Tarneit needs to be brought into the Metro system somehow. The area just that one station is expected to cover is ridiculous for any station, but for a V/Line service that also needs to cover Geelong it is just crazy. Tarneit is already V/Line's busiest station, according to the figures in the OP, the population of Tarneit can be expected to triple over that time period. This is untenable.
Flemington Racecourse
Improve the local bus service, improve the No.57 tram. Leave the heavy rail expenditure for the areas that actually need it.
While I am at it, anybody calling for the Flemington Racecourse line to be extended to Highpoint and points beyond needs to get their backside to Flemington Racecourse and actually have a good look around. The line literally ends up at the top of a big steep hill above the Maribyrnong River, Highpoint is further down the river up on its own hill.
So yeah, good luck with that one.
Wollert
A new line branching off the Mernda line from some point South of Epping heading North into Wollert is what is needed, but without Metro 2, I can't see where the track capacity will come from. The only other option is to re-direct the Upfield line in that direction instead of the much-talked-about-plan to connect that line up with Somerton-Craigieburn-Wallan. Personally I can't see that happening either. The best the good people of Wollert can hope for is a much improved bus network. They are going to need it.
Whittlesea
The new Mernda line has been built in a way that leaves the option for a future extension to Whittlesea open. This will happen, but not for at least another 10 years I wouldn't expect.
Cranbourne East/ South
The extension to Clyde has been committed to, with the line from Dandenong to Cranbourne to be duplicated within the next 3 years, and the extension to be done within the 4 years to follow. This lines up with Clyde opening around the same time as the Metro tunnel.
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The major problems, which I'm guessing most of us on here already knew, are in Melbourne's long neglected outer Western suburbs. The entire area between Sunbury and Werribee is where Australia's largest population growth is going to be, and the rate of PT infrastructure investment is not going to be able to keep up.
It is indeed interesting times in which we live.