Transform 285/400 Project, Atlanta, Georgia

Atlanta, US

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    DB Cost

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    Length

Scope of Work and Project Summary

This extensive project includes new flyover ramps, collector-distributor (CD) lanes, and other facilities to aid east-west travel along I-285 and north-south travel along SR 400. Bridge reconstructions to help expand surface streets to include additional lanes and expand sidewalk capacities.

The Transform 285/400 improvement project aims to alleviate traffic congestion and enhance safety near the I-285/SR 400 interchange in metro Atlanta.

Unique Project Aspects

Extended miles of collector-distributor lanes along I-285 (approx. 4.3 miles) and SR 400 (approx. 6.2 miles); new intersection redesign of Abernathy Road to a Divergent Diamond Interchange (DDI); and partnership with PATH 400 to create a mile stretch of shared-use path along SR 400 and I-285 to help connect to the expansive PATH 400 system.  

Community Benefits

This area has over 500,000 motorists traveling through everyday and with the development of CD lanes these highway improvements will reduce commuter time by eight hours annually and reduce delays by over 12,500 hours daily. 

Project Stats

  • 34 Bridges
  • 42 Lane Miles
  • 148 Retaining Walls
  • 16 Sound Barriers 

Key Figures

Transform 285/400 Project, Atlanta, Georgia

Client

Georgia Department of Transportation

Location

Sandy Springs, GA (Greater Atlanta)

Completion date

2025

Project Size

10.5 miles

Contract Value

$690 million