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.

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.


​SR 22/JR Allen Pkwy at Bradley Park Dr.

Muscogee County

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


 IN OPERATION

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

I‐75 at Windy Hill Road

Cobb County

Why DDI?

The innovative DDI design reduced 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