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Author Topic: Arkansas' First [Proposed] DDI  (Read 824 times)

TheArkansasRoadgeek

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Arkansas' First [Proposed] DDI
« on: March 13, 2018, 03:27:40 PM »

As of 4 years ago (heh -- :pan: I know!) there's this simulation showing N Rodney Parham and I-430 becoming a DDI.


I wonder if this will come to fruition. Now, if you remember me posting about ArDOT's SPUI (Cantrelle Rd. - I-430) proposal, the initial simulation was from 2010 or '11.

As of 2017 GSV, it is not a thing. ArDOT has a post on this (from 2014).

*I don't know why Vimeo is the way it is in this post -- please forgive me.
« Last Edit: March 13, 2018, 03:38:43 PM by TheArkansasRoadgeek »
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US71

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Re: Arkansas' First [Proposed] DDI
« Reply #1 on: March 14, 2018, 11:44:40 AM »

As of 4 years ago (heh -- :pan: I know!) there's this simulation showing N Rodney Parham and I-430 becoming a DDI.


I wonder if this will come to fruition. Now, if you remember me posting about ArDOT's SPUI (Cantrell Rd. - I-430) proposal, the initial simulation was from 2010 or '11.

As of 2017 GSV, it is not a thing. ArDOT has a post on this (from 2014).

*I don't know why Vimeo is the way it is in this post -- please forgive me.

I can't find anything on ARDOT's website regarding a DDI. I know they recently completed adding a NB on-ramp to 430 from Cantrell (vs making a left turn), but I've heard little else.  It may still be in the talking stages.  Let us know what they say if you decide to write them ;)
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hbelkins

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Re: Arkansas' First [Proposed] DDI
« Reply #2 on: March 14, 2018, 12:14:34 PM »

Cue Jeremy calling it a "death diamond" in 3, 2, 1...
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TheArkansasRoadgeek

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Re: Arkansas' First [Proposed] DDI
« Reply #3 on: March 14, 2018, 01:20:00 PM »

Cue Jeremy calling it a "death diamond" in 3, 2, 1...
I died laughing how everytime AHTD has posted something here you guys rip them a new one! I think you guys scared them away. Hint: their last active date is: June 21, 2017.
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US71

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Re: Arkansas' First [Proposed] DDI
« Reply #4 on: March 14, 2018, 02:38:45 PM »

Cue Jeremy calling it a "death diamond" in 3, 2, 1...
I died laughing how everytime AHTD has posted something here you guys rip them a new one! I think you guys scared them away. Hint: their last active date is: June 21, 2017.

Well, it was July they changed to ARDOT, so maybe the old log in isn't valid?

I know they've PM'd the moderators a couple times
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TheArkansasRoadgeek

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Re: Arkansas' First [Proposed] DDI
« Reply #5 on: March 14, 2018, 02:41:54 PM »

Cue Jeremy calling it a "death diamond" in 3, 2, 1...
I died laughing how everytime AHTD has posted something here you guys rip them a new one! I think you guys scared them away. Hint: their last active date is: June 21, 2017.

Well, it was July they changed to ARDOT, so maybe the old log in isn't valid?

I know they've PM'd the moderators a couple times
So, when they request a User ID change, such as mine - it voids the active info?
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TheArkansasRoadgeek

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Re: Arkansas' First [Proposed] DDI
« Reply #6 on: March 14, 2018, 03:06:32 PM »

I just sent an email to District 6 to see what they have on it.

Quote from: Mark Headley, P.E.
District 6 Engineer
Arkansas Department of Transportation
The DDI has since been withdrawn as a solution for the I-430/Rodney Parham Road interchange.

I just replied to this email before posting this, so we will see what he says.
« Last Edit: March 14, 2018, 03:36:49 PM by TheArkansasRoadgeek »
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US71

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Re: Arkansas' First [Proposed] DDI
« Reply #7 on: March 14, 2018, 06:43:12 PM »


So, when they request a User ID change, such as mine - it voids the active info?

You'd have to ask the Admins
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TheArkansasRoadgeek

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Re: Arkansas' First [Proposed] DDI
« Reply #8 on: March 28, 2018, 02:48:53 PM »

I have received further communication from ArDOT in regards to this topic.

Quote from: STEPHEN SICHMELLER, P.E.
STAFF DESIGN ENGINEER | ROADWAY DESIGN DIVISION
ARKANSAS DEPARTMENT OF TRANSPORTATION
Trenton,

This interchange will be modified in Job BB0618 and is currently scheduled for the June 13, 2018 letting.  Please see the attached is a summary of the improvements in Job BB0618.

An AADT map is attached as requested.

As the project progressed in design and analysis, ARDOT staff noted that the diverging diamond interchange design (DDI) severely limits the east/west capacity of the Rodney Parham Road arterial as well as ramp capacities for vehicles entering and exiting the interstate.  Because of these limitations the scope of the project has been modified to the attached summary of improvements.

Thank you for your interest in Arkansas Highways,

The following are the attachments I recieved:

AADT Map & Improvement Summary
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