I'm not sure what you're on about. The track centre spacing won't change, just moving the outer rail about 400mm. Since Ormeau is the only station with side platforms, that could be easily fixed, it might one day get entirely bypassed and become the terminus of the NG line from Beenleigh.
That extra 400mm can be directly added to the train's width. While it would add a bit of extra comfort, it allows for better utilisation of space. It wouldn't be HSR, it would be a proper intercity MSR railway.
Sydney not exceeding 115 is merely a bureaucratic thing. there is around 100km of track within the Sydney suburban area that is capable of more than 115, even for the double deckers. Outside sydney suburban area there is plenty of track with speed boards higher than 115. Up to 160. The OSCARs are allowed to run up to 130km/h.
Some Country branch lines in NSW have speeds up to 160km/h. there is a 90km stretch on the NSW main south that has a speed rating of 160km/h.
Also, if you meant $1 billion on a GC HSR being a waste of money. How much money do you think they have pumped into, and are wanting to pump into the pacific motorway. Why does a billion dollars on a rail upgrade seem absurd while a billion dollars for a few extra lanes for a few km of motorway seem reasonable.
I meant rail spacing
The loading gauge is not that related to track gauge. Containers on freight trains clear the platforms not alot different in Qld than NSW, but yes the NSW passenger rollingstock in Sydney is wider than Brisbane suburban and the XPT is wider than regional QR passenger stock.
The QR IMU's etc do a suitable job servicing the GC and this could include as far as Mull'bah/Byron if required as they run up to Gympie and the ICe units previously as far as Rockhmapton. While the commonsense approach to build greenfield railways to SG and upgrade NG to SG where practical. We are not going to see the GC line replaced, DG'ed or parrellelled with another track as the cost to do so would be far in excess of the value, especially the closer you get to Brisbane you have increasing number of points making track costs even more expensive.
There are numerous issues with the BL that slow up the GC trains and fixing this will add far greater value than chasing 160km/hr or greater and at the same time fix the Beenleigh line.
I didn't say $1B, I said $1, just $1 is $1 too many on HSR.
The Pacific Motorway has a purpose and that is to provide a reasonable carriage way for traffic from Brisbane to the border. There are no other roads that can handle the traffic and little of this would convert to HSR if it appeared overnight for free.
I never said rail doesn't deserve more money. For my money
- the GC line needs to be extended to the GC Airport ASAP, VL is the middle of no where.
- It needs to have four tracks between Salibury and Kuraby built now (currently 3) to enable 8 trains per hour on both GC and 4t/h BL and 4 t/h Kuraby services.
- it needs to have three tracks built properly to Bethania, ie middle track is the passing track over next 5 years.
- its needs alot of money thrown at removing the excessive curvature unfortunately that is mostly where the track was widened to 3 tracks with space for 4. However there is still opportunity south of Kuraby for some major speed improvements.
- It needs the CRR to be built to handle the extra traffic.
Once the above is done, I would recommend NSW govt fork out to extend a single NG track from the GC airport Mull'bah and potentially Byron Bay and later Ballina and pay Qld to run a 1hrly service. By the time Qld has the money to do the above, there will be enough people on the NSW NCL to justify this.