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Diverging Diamond Interchange


New DDI in Nashville Part of Major Interchange Rebuild at I-40, Donelson Pike

The Tennessee Department of Transportation (TDOT) is wrapping up a major interchange project that has been in the works for a few years. Officials with the state agency expect these upgrades to relieve much of the heavy traffic on Interstate 40 near Nashville International Airport (BNA)....


CDOT Kicks Off Interstate 25 Interchange Project in Pueblo

The Colorado Department of Transportation, in partnership with SEMA Construction of Centennial, Colo., began construction of the new Interstate 25 and U.S. Highway 50B interchange on Nov. 18, 2024. The $114 million project is in Pueblo on I-25 from mile point 99.7 to MP 101.4 and on U.S....


WW Clyde Constructs Diverging Diamond Interchange in Colorado

To enhance safety and improve traffic flow, the Colorado Department of Transportation (CDOT) is constructing a diverging diamond interchange (DDI) at the intersection of Airport Road and Powers Boulevard (Colorado Highway 21 / U.S....


MD 4 Project to Add Diamond Interchange

The Maryland Department of Transportation State Highway Administration (MD SHA) continues work on a $283 million project to improve safety and mobility at the interchange of MD 4 (Pennsylvania Avenue) and MD 337 (Suitland Parkway) in the Upper Marlboro area of Prince George's County....


DDI Intersection Project Starts in Colorado Springs

The Colorado Department of Transportation (CDOT) began a $46 million effort in late July to build a more efficient intersection in Colorado Springs at the junction of Colorado Highway 21/South Powers Boulevard and Airport Road, the state agency announced....


SDDOT Diverging Diamond Interchange Project Earns 2024 Award

The South Dakota Department of Transportation's (SDDOT) Diverging Diamond Interchange (DDI) located on Interstate 90 at exit 59 and North LaCrosse Street in Rapid City was recently honored as a winner within the Western Association of State Transportation Officials (WASHTO) region for the 2024 America's Transportation Awards competition....


AECON Installs 50-Ton Girders for New Washington Bridge

Construction crews from design-builder AECON are progressing on the Washington Department of Transportation's (WSDOT) nearly $200 million I-90 — SR 18 Interchange Improvements project. Photo courtesy of WSDOTAs part of the overall project, the construction of a new bridge along SR 18 near Snoqualmie is a major part of the upgrades....


Miller Brothers Wins Bid for County Road 99 Interchange

Miller Brothers Construction of Archbold is the apparent, successful low bidder for the contract to construct a diverging diamond interchange (DDI) at County Road 99 and Interstate 75, in Findlay. The successful bid was $30.8 million....


Growth Spurs SDDOT's Sioux Falls Project

A $34.3 million reconstruction project on Benson Road and the Interstate 229 interchange is unfolding in Sioux Falls, S.D. The undertaking, a combined effort by the South Dakota Department of Transportation (SDDOT) and the city of Sioux Falls, includes construction of a diverging diamond interchange (DDI), structure development work and road widening....


ALDOT Plans to Build New $120M Interstate Exit in Hoover, South of Birmingham

Construction of the new Exit 9 on Interstate 459 in Hoover, Ala., is scheduled to begin in 2025 and be completed in 2027, Hoover Assistant City Engineer Blake Miller told the local chamber of commerce recently....


Today's Top Stories

  1. Billion-Dollar Amtrak River Rail Bridge Replacement Project Under Way in Conn.  →
  2. German Steel-Pipe Maker to Build South Alabama Plant; Birmingham Resumes Repairs to Leaky Dam  →
  3. Crews Building 10-Lane Bridge Over I-77 in Mooresville, N.C.; Raleigh Scraps Six Forks Road Plan  →
  4. After Receiving $3M Grant, Officials in Rutland, Vt. Anxious to Advance Streetscape Project  →
  5. Danieli Working On First California Steel Mill in 50 Years  →
  6. Demolition of Memphis Airport's 50-Year-Old Terminal Part of Modernization Effort  →
  7. University of Utah Begins Construction of First Off-Campus Hospital  →
  8. Maine School District Found Pathways to Fund New Middle School Despite High Costs  →
  9. New Construction in Huntsville, Ala. Region Exceeded $1B in First Half of 2025  →
  10. A's Break Ground On $1.75B Vegas Ballpark Due in 2028  →
  11. Austin Convention Center Demolition Begins  →
  12. Volvo Construction Equipment Wins Red Dot Award for New Electric Design  →
  13. Despite Uncertainty About Federal Funding, Knoxville Pedestrian Bridge Moving Ahead  →
  14. Woods CRW Joins Merlo America's Dealer Network  →
  15. Easy to Own, Operate, New Cat 980 GC Wheel Loader Delivers Hgh Performance, Low Owning, Operating Costs  →
  16. Sherburne School in Portsmouth, N.H., Likely to Be Redeveloped Into New Workforce Housing  →
  17. James R. Carter Paving Fashions Enviable Reputation in Its 70 Years  →
  18. Midwest Gains Greater Access to Brandt Material Handlers  →
  19. Cat Fleet Bucket Program Enables Customers to Equip Their Buckets With Cat Ground Engaging Tools Regardless of Brand  →
  20. Case IH's Kurt Coffey Joins Influential OEM Panel at 2026 AED Summit  →
  21. Anthony Cary Continues Tradition With A&A Forest Products  →





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