tag:blogger.com,1999:blog-2935662058758102231.post6570500873266083778..comments2024-03-20T11:21:16.856-04:00Comments on Heneghan’s Dunwoody Blog: Diverging diamond interchange coming to Ashford Dunwoody & I-285John Heneghanhttp://www.blogger.com/profile/18046846808671417720noreply@blogger.comBlogger5125tag:blogger.com,1999:blog-2935662058758102231.post-35777504122782166012011-02-21T23:27:42.992-05:002011-02-21T23:27:42.992-05:00Fox5 News Coverage
http://www.myfoxatlanta.com/dp...Fox5 News Coverage<br /><br /><a href="http://www.myfoxatlanta.com/dpp/news/metros-busiest-traffic-areas-may-get-some-help-022111" rel="nofollow">http://www.myfoxatlanta.com/dpp/news/metros-busiest-traffic-areas-may-get-some-help-022111</a>John Heneghanhttps://www.blogger.com/profile/18046846808671417720noreply@blogger.comtag:blogger.com,1999:blog-2935662058758102231.post-71418865021796646532010-07-23T16:29:24.016-04:002010-07-23T16:29:24.016-04:00From my blog, I have a link to a YouTube video of ...From my blog, I have a link to a YouTube video of the diverging diamond in Missouri...<br /><br />http://blog.georgiaroadgeek.com/2010/07/17/diverging-diamond-for-dunwoody.aspxGeorgia Road Geekhttps://www.blogger.com/profile/00025369316241643022noreply@blogger.comtag:blogger.com,1999:blog-2935662058758102231.post-2060571653037614802010-07-06T22:05:51.973-04:002010-07-06T22:05:51.973-04:00Dunwoody Crier Article
Innovative re-design above...Dunwoody Crier Article<br /><br /><a href="http://www.thecrier.net/articles/2010/07/06/front/i285.txt" rel="nofollow">Innovative re-design above I-285</a> <br /><br />Drivers will have to get used to driving on what seems the wrong side of the road, but the newly approved re-design of the Ashford-Dunwoody and I-285 interchange promises to ease congestion and improve traffic flow.<br /><br />The Perimeter Community Improvement District has been awarded an $800,000 grant and a $684,000 loan from the Georgia Transportation Infrastructure Bank to begin work on an innovative re-design of the congested intersection. The design will use a “diverging diamond” interchange concept, the second in the nation, to add additional capacity without adding new lanes.<br /><br />The redesign will re-stripe lanes, alter signal timing and eliminate most left turn lanes.<br /><br />Yvonne Williams, PCID President said the diverging diamond design provides an interim solution.<br /><br />“We were able to find a way to innovatively provide traffic relief while developing a beautiful entry way to the Perimeter-Dunwoody area,” she said. Williams adds that it is expected the interchange will eventually have to be reconstructed at an estimated cost of $170 million, but in the meantime, this project, projected at $8 million will help ease congestion within a year.<br /><br />“If we can line up all the money, we hope to be under construction in 2011,” said Williams.<br /><br />The PCID was awarded the grant by the State Road and Tollway Authority in a competitive process. SRTA board member Wendy Butler said the Ashford-Dunwoody interchange redesign stood out for a number of reasons: the bridge is geographically significant in terms of congestion and as an entrance to a major employment center and the redesign was both innovative and cost-effective.<br /><br />“We found the redesign would have significant benefits with a minimum of capital expenditure. It should significantly improve mobility, relieve congestion and make the interchange safer,” added Butler.John Heneghanhttps://www.blogger.com/profile/18046846808671417720noreply@blogger.comtag:blogger.com,1999:blog-2935662058758102231.post-25233350349522597382010-07-05T20:29:26.470-04:002010-07-05T20:29:26.470-04:00That sample diagram appears at Wikipedia...it is n...That sample diagram appears at Wikipedia...it is not a Georgia DOT or Dunwoody diagram, which is why the lower road is not labeled "I-285"). <br /><br />What's not clear is how well these diamonds work when the traffic on the lower road (i.e. I-285 in our case) is so backed up that its entrance ramps are blocked. This is a large part of what causes the current congestion on Ashford-Dunwoody. <br /><br />I'd hate for us to spend the significant sums of money and put up with construction barriers headache there (yet again) but only to find out that the Ashford-Dunwoody congrestion no better.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-2935662058758102231.post-73789459249635903222010-07-05T14:45:13.748-04:002010-07-05T14:45:13.748-04:00Your sample states Interstate 75 and not 285. I be...Your sample states Interstate 75 and not 285. I believe that this will incur more wrong way traffic since it is confusing for all drivers. The amount of traffic will not diminish and the back up of autos in both directions on Ashford Dunwoody. One of the main problems there are cars cutting across lanes to get onto the entrance ramp for the freeway. If you simply put up a divider it would reduce problems.Mamacitahttps://www.blogger.com/profile/00144916668431438059noreply@blogger.com