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Divergent Diamond proposed in... Freeport Maine?!

Started by yakra, October 27, 2012, 03:18:27 PM

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yakra

October 27, 2012, 03:18:27 PM  
http://www.maine.gov/mdot/freeportddi/
QuoteThe I-95 Desert Road interchange in Freeport has considerable traffic that causes congestion issues at certain times of the day. The issue is predominantly at the southbound off-ramp, as traffic tends to backup periodically onto the Interstate.

MaineDOT has a potential solution to the traffic issue. The solution is called a Divergent Diamond Interchange.

Other states have constructed these interchanges, so please keep an open mind when viewing.
Congestion? I must be driving at the wrong times of day; I wasn't aware it was broke!
(Then again, I'm not sure if I've ever needed to make a left from the offramps...)
"Officer, I'm always careful to drive the speed limit no matter where I am and that's what I was doin'." Said "No, you weren't," she said, "Yes, I was." He said, "Madam, I just clocked you at 22 MPH," and she said "That's the speed limit," he said "No ma'am, that's the route numbah!"  - Gary Crocker

yakra

#1
October 27, 2012, 03:31:22 PM  
QuoteThe I-95 Desert Road interchange
Apparently, MDOT didn't get the memo that they changed the number of that little highway of theirs to I-295 eight years ago.

The exit in question is *cough* Exit 19. ;) :poke:
"Officer, I'm always careful to drive the speed limit no matter where I am and that's what I was doin'." Said "No, you weren't," she said, "Yes, I was." He said, "Madam, I just clocked you at 22 MPH," and she said "That's the speed limit," he said "No ma'am, that's the route numbah!"  - Gary Crocker

Alps

#2
October 27, 2012, 05:44:52 PM  
Probably certain times of certain days during certain seasons. DDI is a relatively inexpensive solution, because it fits in a diamond footprint pretty much.

empirestate

#3
October 27, 2012, 06:53:33 PM  
Quote from: yakra on October 27, 2012, 03:18:27 PM
Congestion? I must be driving at the wrong times of day; I wasn't aware it was broke!
(Then again, I'm not sure if I've ever needed to make a left from the offramps...)

My sentiments exactly when the DDI was proposed in Rochester, NY. Maybe the design is particularly well suited to solving traffic issues that don't really exist?

NE2

#4
October 28, 2012, 02:14:01 AM  
Seems that a DDI works best when turning movements are high and traffic crossing the freeway is low. The fact that it fits not only in the existing footprint but on or under the existing bridges is a major plus.
pre-1945 Florida route log

I accept and respect your identity as long as it's not dumb shit like "identifying as a vaccinated attack helicopter".

froggie

#5
October 28, 2012, 11:38:47 PM  
I can believe a DDI there.  Even in the wintertime, there can be a fair bit of traffic going to/from LL Bean.

mtantillo

#6
November 04, 2012, 10:07:08 PM  
Some of my co-workers are doing the traffic simulation and analysis for this DDI. 

froggie

#7
January 05, 2014, 11:15:31 AM  
I've created a GIS map that illustrates this DDI proposal, as well as under-construction improvements at Exit 15 in Yarmouth and posted them in a separate thread.
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