...will now harp on about the Paris RER and be an expert of a system he has never used and try and compare to Sydney's new Metro line, but the two are completely different in so many ways its not even funny and these have all been discussed to excess previously. Some who have used the R.E.R, including Matthew Geier, very knowledgeable, do liken it to the Sydney suburban. That comparison isn't my own.
If Paris can run 30 double decker trains an hour, surely a stand-alone double decker train line in Sydney could too. Yes, I really mean a stand alone one.
I really don't give a crap what Mathew Geier said as I'm talking from first hand experience.
Basically the RER has little in common with Sydney apart from it being double decker based stock. The one line that has the most in common with Sydney is the C Line and it has all the problems that the Metro in Sydney is being designed to avoid.
From wiki"The RER C line is the second-longest in the network, with over 187 km (116 mi) of route. RER C was created from an amalgamation and renovation of several old SNCF commuter lines unlike RER A and B which had newer sections owned and constructed by RATP. Each day, over 531 trains run on the RER C alone.......................The numerous stops combined with an old and fragile infrastructure the line inherited, makes the Parisian section of the RER C very slow and inefficient. The numerous old curves and steep grades on RER C means trains sometimes need to slow down to 40km/h to safely pass sections with tight alignments. ...................These problems are particularly evident on trips to and from the northern suburbs to the city center as taking Transilien lines and transferring to the Métro is much faster than taking the meandering RER C with closely spaced stops. In addition, the RER C's complicated operating schedule created by its complex network of numerous branches means the entire line is vulnerable to delays from even the smallest incidents. These issues have led to the line been called "réseau escargot régional" (Regional Snail Network) by the local populace"
The C line also has limited to 2 door trains, has stations on tight curves such that they have low height platforms and the list goes on.
The Current NSL infrastructure will not support frequencies above 20t/h and Town Hall Station is one of the key restraints in doing so which is very difficult to resolve. The Metro will have ultimate capacity to run 30t/h, something unlikely to be achieved with the current DD rolling stock on any line with reasonable station usage.
The modern Sydney Metro is automated and being built with this in mind and existing sections will be upgraded to the standard required for Automation and in general what a modern suburban railway should have. ie platform screen doors, straight or mostly straight platforms, tunnels with full length emergency access platforms and frequent exit locations. I also strongly suspect most of the station staff and any on board staff regardless of function will be trained to operate a Metro train for short distances at low speeds and evacuation procedures. If not the Management need replacement.
I know you don't give a crap about lifecycle operating costs Mytone, but the bulk of the NSW taxpayers do and as the new line is mostly underground, there are significant savings in building a SD line and this is what the bloody French do. The RER is basically a surface network with a few high density tunnels connecting in the city, the new line is more like a Paris Metro in this regard being and as stated previously, no one builds predominately underground lines 30km long in DD format, No one!
Sydney Rail has some of the highest operating subsidies in the world and one of the most expensive construction costs per km and a history of screwing up major tunnel projects and unfortunately nearly all inner middle suburban construction projects will be underground going forward. This is in part the cause for lack of investment in recent decades and we want more rail infrastructure, something has to change if we expect the govt to fund it.