Diverging Diamond Interchange (DDI)

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Brad
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Diverging Diamond Interchange (DDI)

Postby Brad » Thu Oct 12, 2017 9:53 am

Nebraska has stared using the Diverging Diamond Interchange (DDI). The first one that I know of is on 48th & I80 in Lincoln.

1. Here is 48th & I80 from Google Earth
DDI.JPG
DDI.JPG (113.23 KiB) Viewed 264 times


2. Here is a youtube video(From another state) showing how they work.
https://youtu.be/5gLxlXamhgY
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skinzfan23
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Re: Diverging Diamond Interchange (DDI)

Postby skinzfan23 » Thu Oct 12, 2017 10:04 am

Funny you brought this up. On our way to Branson last weekend we went through the one in Springfield, MO, which was the first one built in the US. Traffic seemed to flow pretty smoothly through it. It was a little weird driving south on the left lanes though.

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Re: Diverging Diamond Interchange (DDI)

Postby MTO » Thu Oct 12, 2017 10:12 am

Do they use these in urban areas too?
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Brad
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Re: Diverging Diamond Interchange (DDI)

Postby Brad » Thu Oct 12, 2017 11:51 am

MTO wrote:Do they use these in urban areas too?


Never seen one in person, but found this:

www.divergingdiamond.com wrote:Q) Is a DDI better in an urban or rural setting?

A) The DDI can be placed in any setting. A DDI in a rural area may have the advantage of different signal progression options. A DDI in an urban area has the advantage of being able to fit in a tight area. The traffic volumes usually guide the consideration for the DDI no matter what setting it is in.
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TitosBuritoBarn
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Re: Diverging Diamond Interchange (DDI)

Postby TitosBuritoBarn » Thu Oct 12, 2017 11:52 am

Nice! That's oddly progressive of the NDOR (NDOT?)

MTO wrote:Do they use these in urban areas too?


There's one in the Chicago suburbs near the border of Aurora and Naperville:

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iamjacobm
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Re: Diverging Diamond Interchange (DDI)

Postby iamjacobm » Thu Oct 12, 2017 12:10 pm

There is one off of I29 just south of KCI and another on the Kansas side of the metro.

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HR Paperstacks
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Re: Diverging Diamond Interchange (DDI)

Postby HR Paperstacks » Thu Oct 12, 2017 6:25 pm

TitosBuritoBarn wrote:Nice! That's oddly progressive of the NDOR (NDOT?)

Yep, NDOT now. And I agree. I'm surprised to see one here too. Although they have been SPIs for a while which is a little more progressive than the diamond and folded diamond interchanges typically used. But those are only really used in urban areas (like Dodge).

I wonder if they'll eventually do the 192nd St interchange as a DDI. Seems like a good opportunity.


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