Welcome to the official website of the diverging diamond interchange. Here, you can learn all about the diverging diamond interchange including:
- What is the diverging diamond interchange (DDI) and how it works
- How the design can significantly improve traffic operations
- Why the design is considered a safer design than other diamond interchange forms
- Why this concept is such a low cost solution
- The history of the DDI
- Specific features related to the design
This website is targeted primarily to transportation engineers and planners, but also provides the background necessary that allows any transportation enthusiast to learn about this innovative design. All questions, comments, and suggestions can be directed to email@example.com. Additional updates will be placed on the website when possible.
Photo: Aerial photo of I-44 / Kansas Expressway Diverging Diamond Interchange in Springfield, Missouri. First of its kind in the U.S. Photo from Missouri Department of Transportation.
April 27, 2012: Lancaster, PA - ITE Mid-Colonial Meeting "New Intersection Concept - Two-Way Continuous-T Intersection"
May 10, 2012: Sandy, UT - Utah DOT Research Workshop "Keynote Speech on Innovation in Transportation"
June 26, 2012: Chicago, IL - TRB 4th Urban Street Symposium "Learning from Six Operational DDIs in the US" *** Selected as one of the best presentations at the conference ***
Can't attend any of these? Schedule one of our courses in your area by searching HERE.
DIVERGING DIAMONDS OPEN TO TRAFFIC IN THE UNITED STATES
I-44 @ MO 13 Kansas Expressway - Springfield, Missouri
US 60 James River Freeway @ National Avenue - Springfield, Missouri
I-15 @ American Fork Main Street - American Fork, Utah
I-270 & Dorsett Road - Maryland Heights, Missouri
US 129 Bypass / SR 115 @ Middlesettlements Road / Bessemer Street - Alcoa, Tennessee
I-15 @ SR 92 Timpanogos Highway - Highland, Utah
KY Route 4 (New Circle Road) @ US 68 (Harrodsburg Road) - Lexington, Kentucky
Bangerter Highway @ SR 201 - West Valley City, Utah
I-15 @ 500 East - American Fork, Utah
I-435 @ Front Street - Kansas City, Missouri
US 65 @ SR 248 - Branson, Missouri
I-285 @ Ashford-Dunwoody Road - Dunwoody, Georgia
MD 295 @ Arundel Mills Boulevard - Hanover, Maryland
US 67 @ SR 221 - Farmington, Missouri
I-590 @ South Winton Road - Brighton, New York
NEW!!! US 65 @ Chestnut Expressway - Springfield, Missouri
NEW!!! I-580 @ Moana Lane - Reno, Nevada
NEW!!! MO 150 @ Botts Road - Kansas City, Missouri
Please contact us if you know of an additional location where a DDI is opened to traffic.