That's Gothard Base Tunnel.Billy
Do you think this concept could apply to intercontinental routes? With a 1000 km/h speed and chordal routes were looking at Sydney to London in 14 hours, LA in 8, with all the advantages you mentioned plus no problems with weather.Yes I think it would be quite possible over time with steel undersea tubes anchored to the sea floor and who knows how fast they could go eventually but I do not think I would be around.
Chordal route, direct straight line, will go under the sea. Sydney to London may get a bit close to the molten core though. Will need excellent heat insulation.Might also make it a bit difficult for any of Eddy's rescue services to get there in an emergency.
He's right Eddy, you wriggle and shake like a greasy old snake, you do anything but actually answer questions people ask, and you've not provided a shred of evidence that anybody other than some top knob game playing so called Queenslander who fancies himself as an engineer considers your fantasy even remotely viable. The only links I've been able to find about this are about fantasy transport or seem to be the result of a first year uni brainstorming project where money is no problem. There's a comment in one of my previous links about the entire population of NY having to commute to LA every day, and vice versa for the system to be anywhere near profitable. I think they were generous. And when people here and at skyscrapercity etc. treat you like a moron you carry on like a petulant child.OK
Like fighting windmills. Again; your tunnel costs are just an extrapolation km per km of the nw railway costs. Unless you plan to use exactly the same style of railway I can't see the relevance. Find some figures for the chuo shinkansen and extrapolate from that instead. But I'm guessing they won't fit your agenda. You won't kill flights between the two cities and why would you want to? Everybody in the east will find Mascot more convenient, the two transfers on your system are a PITA, there are transfer passengers etc. One of your links states the cost of running a flight at 95% of revenue, so paying back the initial cost, if it's as low as you think, will be more like 600 years than 30. Hospitals contribute to productivity as they make sick people productive again. Your project will add nothing to transport capacity than already exists. It's cheaper to build more housing estates on the edge of Sydney and Melbourne and invest in decent MSR than your scheme. Drop this stupid idea and move on.Thanks to you I realised it needed carriages at stations and this enabled passing loops that now give a one and a quarter hour one seat ride between Sydney and Melbourne every 15 minutes with 15 minutes in stations so people who are getting off/on have plenty of time.
And a car yard is being built on the site of your proposed Parramatta station, so forget that plan and move the station to somewhere sensible like Sydney.It is easier to drive a future northern Magtube below Parramatta river than beneath the harbour and anyway Parramatta is the centre of greater Sydney.