I'm going to respond to a tonne of things I have read in this thread:
Doors on a train:
A few people had this argument, and I failed to see the point, DD trains are 4 or 8 carriages, possessing 2 doors per carriage. Compare that to SD being 3 or 6 carriage, and 3 doors per carriage, which some are actually 2. No matter how you count it, this equals the same number of doors, although the DD's are 20 or so meters longer.
Well, also the doors are wider, that's another thing. But, this comparison is really pointless, because on an SD train you could make the entire side of the train a door, which was actually the case, there are trains from the past where every seat had it's own door. You couldn't do that with a DD, unless the DD had low platforms.
It doesn't really matter if you do have more space on a train, via the use of double decks, because the same result will be found, I don't want to use the decks, because of reasons. Many people don't want to sit down, for various reasons, if I were to hop on a train, the odds are I would decide to stand in the doorway regardless, so wouldn't it be smarter to rather then have two decks, just remove all the seats, put more doors in, so that pax like myself who are a little bit autistic can avoid having to sit next to an unknown person on a train?
Sydney has a very different rail network, one that makes it very expensive to buy trains for, this price prevents expansion, the price figures into every future decision. Am I going to expand the network? Hell no, it costs too damn much. Imagine if Sydney had not gone to DD, and had instead fixed it's signalling, maybe there would have been more money to run more track, run more stations, maybe they would have more tunnels by now? Every negative decision you make dooms future decisions. So, one day, as Sydney slowly adopts a metro style SD system, the old DD network will eventually be gone, slowly and surely, that is the progression. Give it 50 years, and I don't see DD in Sydney surviving, but then again I won't be there to see it, so please, bookmark this post, dig it up down the track, I am totally right.
Public Vs Private:
Depending on where you live, this goes in two different directions. I live in a Labor area, boooo, no privatisation, unions FTW. Libs? Sell sell sell!!!!
Honestly, I can see past the arguments, see, you need your train network in public hands, only a government could give the tick of approval to expensive DD sets. And that's the thing, private really is no different, they simply operate the network, because public workers are the laziest sacks of crap you'll ever meet. At least a private operator cares about making itself money. A private operator can say, let's skip those pesky stations as we are late, or let's cancel services to avoid fines due to a loophole.
We need to do this for X reason:
Pipe dreams never come true, I've had many in my time, but the simple thing in life is that things are the way they are due to the background economics you aren't privy to. So many factors, but in the end, there is always the impulse to keep things running the same. In the end that is how business works. Attempt to innovate, but at the end of the day, everyone needs to wake up each day and keep the big machine turning.
A business I worked for recently had a very outdated database entry system, that someone in a previous lifetime had paid good money for. Now, as much as it could be proven the thing had to go, the argument still stands that a previous investment needs to be seen through. If you have a double track running through a cutting in the ground, multiple bridges, and km's of track and multiple stations. These items being in good standing, you aren't going to just rip them out of the ground in favour of a tunnel underneath Sydney road. This is by far the most retarded thing I've ever heard of (I'm autistic so I'm allowed to use the word retarded).
Infrastructure is generally used until it's at the end of it's life. The Citylink tunnel will be used until someone decides it's no longer safe, just like Kooyong tram square, hell, they will probably keep that tram square going until significant damage occurs to a train or to someone's health. Look at the twisted pair phone network, it's been in place for how long? It looks like the biggest mess, and it's still going to be there for a few more decades to come, use it until it crumbles.
This was an Upfield suggestion? So, that anyone knows, Upfield is a short line, very close station spacing, single track for the last station which is a long distance from Gowrie. Now, if nobody is rushing to upgrade this to dual track, how is this going to get a metro tunnel? It's the most incoherent babble from someone that doesn't live in the real world. It's like me debating World War 2 and the Great War with my grand parents, who were Jewish and from Britain. What could I possibly add to the subject? It's stupid. Simple as that. How about sunken railways? Well, you know, we could do it, we'd have to build it next to the current line to avoid preventing services, would have to bulldoze a lot of property, oh you didn't think this was Simcity and it was going to occur at the press of a button?
Eventually half way to laying down track 2 years after the first hipster appartment complex was pulled to the ground, possibly a heritage listed property too, one of those factory conversions on the west side of the line. Someone is going to scratch their head and go, you know what, we have 4 tracks, it seems a shame to bulldoze those other two, maybe we could turn those tracks into a bikeway, yes, a bikeway, now you are on the money, and we could put bike cafes all the way down the bikeway, but we already have a bike path already? Well, let's turn that into, into, hmm, what should we turn that into? Umm, another bikeway. Yes, that will bring in a lot of tax dollars.
You ever think that maybe there just isn't any logic in this? For example, why not build a completely new train line, keep the old one there, and this one, well, let's build it to Doncaster instead, I think they need this more then us hipsters and low-socio's on the Upfield line (this is my line BTW).