Diverging Diamond Interchange

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Re: Diverging Diamond Interchange

Postby gerben » Sun Dec 26, 2010 10:56 pm

This is the one in France that is mentioned in the article:

http://world.waze.com/cartouche/?zoom=5 ... FTFTFFTTTT

I think a lot of people need to get used to this kind of intersections before they work OK... It seems unnatural to drive on the left side for a while, but the possibility of turning left onto a freeway ramp without traffic lights or crossing traffic can work OK.
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Re: Diverging Diamond Interchange

Postby gettingthere » Thu Aug 18, 2011 3:37 am

And what is the logic with this so called 'double diamond' crossing? To cause a head-on collision when someone doesn't think for a second and ends up on the incorrect side of the road?

And what purpose does this serve? Something similar to a traffic circle but more efficient?
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Diverging Diamond Interchange

Postby gettingthere » Thu Aug 18, 2011 5:28 am

Ok. You caught me. I didn't read the entire thread.
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Re: Diverging Diamond Interchange

Postby ircphoenix » Thu Aug 18, 2011 5:09 am

I'm pretty sure that I just wrecked my car from even LOOKING at these interchanges. Thanks guys. Thanks.
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Re: Diverging Diamond Interchange

Postby jondrush » Thu Dec 30, 2010 6:26 pm

Single Point Urban Interchanges are more interesting to me, because they can solve existing urban issues without consuming more land.
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Re: Diverging Diamond Interchange

Postby jondrush » Sat Jan 01, 2011 5:54 am

What I meant was, they can be built without taking any significant additional land from property owners beyond what exists today in a typical urban interchange, where right hand turns are made at a light. A double diamond is wider than a typical urban interchange. The single point only requires lengthened ramps and wider bridges, which will usually be taken from land that is already in the highway right-of-way. Opposition to additional land grabbing is the number one blockade to upgrading urban interchanges.
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Re: Diverging Diamond Interchange

Postby jondrush » Sat Jan 01, 2011 6:01 am

CBenson wrote: Hey, that looks familiar. I just cleaned up one of those here: http://www.waze.com/livemap/?zoom=15&la ... yers=BTTTT

All the ramps were already there and the arterial road (Telegraph Road) was already split, so I just edited the connectivity to make the intersection work. However, I suspect I will have to go back and simplify the interchange at some point.

Cool, yep that would be a lot easier if Telegraph hill wasn't split. Also prolly shouldn't be a Major Highway, should it. :geek: :mrgreen: :twisted:
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Re: Diverging Diamond Interchange

Postby khaytsus » Thu Aug 18, 2011 2:38 am

Yay me, I get to fix one of these in town now.. Harrodsburg Road under New Circle Road in Lexington construction just (mostly) wrapped up on one of these Double Crossover Diamond, or at least that's what they keep calling it.

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