en.Wedoany.com Reported - The I-285/I-20 West Interchange project, overseen by the Georgia Department of Transportation (Georgia DOT), is now underway. This $1.25 billion project, scheduled for completion in 2030, spans Fulton and Cobb Counties and aims to alleviate a major traffic bottleneck in the Atlanta metropolitan area and improve one of the nation's worst truck congestion points.
Construction is led by Legacy Infrastructure Contractors, with C.W. Matthews Contracting as the primary contractor and Infrastructure Consulting and Engineering providing design services. The project involves rebuilding and widening the I-285/I-20 interchange ramps, adding a combination of collector-distributor/connector lanes and auxiliary lanes on the west side of I-20 and the north side of I-285, and constructing new dual-lane ramps. Concurrently, bridge replacements and widenings are taking place, including the widening of six bridges, the replacement of one bridge deck, the full replacement of two bridges, and the construction of nine new structures.
Construction began in April 2025. Current heavy construction activities include site grading, installation of erosion control measures, and work on the foundations and substructures for the interchange ramp bridges. In late February, the first set of bridge girders was installed on the elevated ramp from westbound I-20 to southbound I-285, marking the project's transition into superstructure construction. This ramp, stretching 2,700 feet, will utilize 80 prestressed concrete bulb-tee girders, each weighing over 127,000 pounds. The girders range from 4.5 to 6 feet in depth and 120 to 165 feet in length. This ramp is slated to open to traffic in mid-2027.
The project employs three deep foundation systems—drilled shafts, spread footings, and driven piles—to suit varying soil conditions. Drilled shafts extend over 100 feet deep to reach bedrock, spread footings are used where solid rock is near the surface, and driven piles are hammered into stable soil layers. Controlled blasting operations commenced in mid-June 2025 to excavate rock for the interchange's new ramps, with traffic slowdowns and stringent safety protocols in place during these activities.
Traffic management involves timed lane closures and nighttime work, with lanes kept open during peak hours. The Traffic Management Center coordinates efforts and provides public advisories to minimize disruptions. Equipment on site includes crawler cranes, excavators, and medium-sized dozers/compactors. Materials used include precast and cast-in-place concrete, asphalt, and graded aggregates.
Upon completion, the project will enhance ramp safety and sight distances, reduce merge conflicts, improve truck traffic efficiency, and benefit the entire Atlanta metropolitan transportation network.
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