AARoads Forum

Regional Boards => International Highways => Topic started by: Great Lakes Roads on November 03, 2016, 05:19:52 PM

Title: Australia's First DDI??
Post by: Great Lakes Roads on November 03, 2016, 05:19:52 PM
A DDI is proposed in Queensland, Australia which will be their first diverging diamond in the country! Remember that Australia drives on the left, so this will be a little different layout than in the US.

Articles:
https://www.newcivilengineer.com/world-view/australia-gets-first-diverging-diamond-interchange/10014372.article

http://www.theconstructionindex.co.uk/news/view/jacobs-joins-team-for-bruce-highway-upgrade
Title: Re: Australia's First DDI??
Post by: jakeroot on November 03, 2016, 06:16:47 PM
What's funnier to me is the proposed layout. At left, is (AFAIK) the world's first RHD DDI, in Durban ZA. At right, is the proposed QLD DDI. Talk about curvy!

(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fi.imgur.com%2FOmWngXL.png&hash=e5945b09aa04a73707e77716ec27c0ffa05aaafc) (https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fwww.theconstructionindex.co.uk%2Fassets%2Fnews_articles%2F2016%2F09%2F1474129951_19sep16-bruce-highway.jpg&hash=7e3233e8ea71f164b8d179e408dd521807f30e84)
Title: Re: Australia's First DDI??
Post by: Alps on November 03, 2016, 10:36:38 PM
Quote from: jakeroot on November 03, 2016, 06:16:47 PM
What's funnier to me is the proposed layout. At left, is (AFAIK) the world's first RHD DDI, in Durban ZA. At right, is the proposed QLD DDI. Talk about curvy!

(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fwww.theconstructionindex.co.uk%2Fassets%2Fnews_articles%2F2016%2F09%2F1474129951_19sep16-bruce-highway.jpg&hash=7e3233e8ea71f164b8d179e408dd521807f30e84)
Design speed is WAY too high for those ramp curves.
Title: Re: Australia's First DDI??
Post by: johndoe on November 16, 2016, 07:43:13 PM
It's a shame more of the original geometry couldn't be reused.  Also interesting with the extra NB bridge to avoid the right turn at the outer road.  Seems like a lot of vacant land and trees to warrant another bridge!