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Diverging Diamond Interchange

A Diverging Diamond Interchange (DDI), also known as a double crossover diamond (DCD), is a diamond interchange that crosses traffic to the opposite side of the road across an interchange so vehicles have unimpeded movement onto the freeway ramps. Left-turn movements, which are a typical challenge with standard four-way interchanges, are eliminated with a DDI.

 ‭(Hidden)‬ Announcements

NEWS

 

Under Design or Construction

I-285 at SR 6/Camp Creek Pkwy

Fulton County

The construction of a diverging diamond interchange at the existing overpass of SR 6/Camp Creek Parkway at I-285 located in East Point, Fulton County, Georgia.

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I-75 at SR 20/McDonough-Hampton Rd

Henry County

​This project will convert the existing interchange into a Diverging Diamond Interchange.


 IN OPERATION

ProjectLocationResources
I‐285 at Ashford Dunwoody Road
Dunwoody, DeKalb County
I‐85 at Pleasant Hill Road
Duluth, Gwinnett CountyVIEW WEBPAGE
I‐85 at SR 140/Jimmy Carter Blvd
Duluth, Gwinnett CountyVIEW WEBPAGE
I‐75 at Wade Green Road
Duluth, Gwinnett CountyVIEW WEBPAGE
I‐95 at SR 21
Duluth, Gwinnett County
I‐75 at Windy Hill Road
Duluth, Gwinnett CountyVIEW WEBPAGE

Why DDI?

The innovative DDI design reducrd potential points of intersection traffic conflicts and improves traffic flow and safety.

Safety Benefits

  • Fewer conflict points
  • Wrong Way entry to ramps extremely difficult
  • Reduced speeds through intersections
  • Minimal driver confusion

Under Consideration

ProjectLocationDelivery Method
I‐75 at SR 20
McDonough, Henry CountyNA
SR 10 loop at SR 8/SR 10/Atlanta Hwy
Athens, Clarke CountyNA
SR 22/US 80 at Bradley Park Drive
Columbus, Muscogee CountyNA