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https://mail.sensational-adelaide.com/forum/viewtopic.php?t=3172
It won't be a tunnel.Shuz wrote:You lot need to calm your farms. It's going to be a tunnel. End of story. There is no further argument.
ChillyPhilly wrote:
This is a whip-up I did a while ago, based on the preferences listed by the Scoping Report.
A bit like one of the original plans for the T2T section: http://www.dailymotion.com/video/x2ps0tiSBD wrote: ↑Tue Dec 12, 2017 4:09 pmIt would possibly be a more expensive solution, but one way to keep the corridor narrower would be to partially stack the continuous and local roads.That is what is achieved through the very high Superway north of Regency Road.I'm not sure what height and access constraints led to that elevated road. I wonder if a simpler version could be achieved by putting the through road in a trench, and cantilevering the local roads over the top. If each direction has three lanes in the trench and only two surface lanes, then there is scope for an opening in the middle which provides natural light and avoids some of the complexities that a true tunnel introduces, such as ventilation. The construction does not have to be strict cantilever engineering, as it would be possible to have beams that span the entire width (maybe even with a support in the middle).
Have I missed an obvious reason why this could not be possible, particularly in the areas where a wide corridor is not wanted?
Yes, that explains why I didn't think it was an original thought, but I couldn't remember having actually seen it anywhere else.Llessur2002 wrote: ↑Tue Dec 12, 2017 4:15 pmA bit like one of the original plans for the T2T section: http://www.dailymotion.com/video/x2ps0tiSBD wrote: ↑Tue Dec 12, 2017 4:09 pmIt would possibly be a more expensive solution, but one way to keep the corridor narrower would be to partially stack the continuous and local roads.That is what is achieved through the very high Superway north of Regency Road.I'm not sure what height and access constraints led to that elevated road. I wonder if a simpler version could be achieved by putting the through road in a trench, and cantilevering the local roads over the top. If each direction has three lanes in the trench and only two surface lanes, then there is scope for an opening in the middle which provides natural light and avoids some of the complexities that a true tunnel introduces, such as ventilation. The construction does not have to be strict cantilever engineering, as it would be possible to have beams that span the entire width (maybe even with a support in the middle).
Have I missed an obvious reason why this could not be possible, particularly in the areas where a wide corridor is not wanted?
Click here to view the report: https://www.infrastructure.sa.gov.au/__ ... rategy.pdfA review of the services work to date from the planning studies identified that there was only one
major piece of services infrastructure that would significantly impact the program timeframe being the
Telstra Exchange near Cross Road (approximately 5 years to relocate). The relocation of the
exchange needs to be funded as an associated works project five years in advance of the funded road
project. Alternatively further design work needs to be undertaken to determine options to avoid the
need to relocate the exchange.
The reality is that no work will get done on the North-South Corridor unless it is funded by the Federal Government. A report by the Grattan Institute http://www.harley.net.au/temp/Transport ... omises.pdf makes it clear that all of the political parties are suspect when it comes to promises of funding for transport projects.rev wrote: ↑Tue Dec 12, 2017 12:03 pmIf Labor gets back in, it'll get done.
If Liberals get in, work will stop, or it'll be botched in another one way motorway example.
If Xenophon gets in, he'd probably cave and build them the worlds most expensive tunnel and gets dressed up as a tunnel boring machine for the opening.
Spot on. Have been thinking this myself as the obvious option in bottleneck areas.SBD wrote:It would possibly be a more expensive solution, but one way to keep the corridor narrower would be to partially stack the continuous and local roads.That is what is achieved through the very high Superway north of Regency Road.I'm not sure what height and access constraints led to that elevated road. I wonder if a simpler version could be achieved by putting the through road in a trench, and cantilevering the local roads over the top. If each direction has three lanes in the trench and only two surface lanes, then there is scope for an opening in the middle which provides natural light and avoids some of the complexities that a true tunnel introduces, such as ventilation. The construction does not have to be strict cantilever engineering, as it would be possible to have beams that span the entire width (maybe even with a support in the middle).
Have I missed an obvious reason why this could not be possible, particularly in the areas where a wide corridor is not wanted?
The comparative speed of vehicles on the SEXY was interesting. Don't you just love those drivers who speed past you in an adjacent lane, change into your lane and then slow down to the same, or slower, speed as you! They have a real Michael Schumacher complex!Norman wrote: ↑Tue Dec 26, 2017 9:37 amAnd here is a video of the whole corridor. It took me 66 minutes to drive from Old Noarlunga to Gawler, but the video shows it in just over 8 minutes
https://youtu.be/dZ7v3Jx9OiU
