Skip to Main Content
logo
Highway construction over river with vehicles and green forests.Highway construction over river with vehicles and green forests.

Transforming transportation in South Carolina 

The South Carolina Department of Trans­porta­tion (SCDOT) has embarked on the Carolina Crossroads project to deliver over $2 billion in improve­ments along the interstate corridor. 

Client

SCDOT

Location

Columbia, South Carolina

Practices

Transportation Construction, Engineering and Inspection (CEI)

Markets

State Department of Transportation

Priorities

Complete Corridors

Connect with an expert

brunson_thad_v2.jpg
Thad Brunson PE, DBIA
CEI Services Manager

South Carolina rebuilds its busiest interchange to improve safety and mobility  

Once nicknamed “Malfunction Junction,” the convergence of I-20, I-26, and I-126 has long challenged commuters and freight alike. Through Carolina Crossroads—the largest transportation program in state history—SCDOT delivers upgraded infrastructure that saves time, improves safety and supports the state’s growing economy.  

Reduced traffic congestion and travel time 

Travelers are expected to save up to 112 hours annually in travel time, making for smoother and more consistent mobility. 

Enhanced safety for all drivers 

Reconfigured interchanges eliminate weaving conflicts, lower crash risks, and improve emergency access. 

Upgraded bridges, lanes, and interchanges 

Modernized interchanges, additional lanes and new bridges prepare SCDOT’s transportation network for future mobility needs. 

Regional development and economic vitality 

Carolina Crossroads aligns infrastructure expansion with regional growth, accessibility and economic progress. 

CDM Smith is also supporting public outreach and deploying custom statistical analysis tools. The team further manages environmental compliance, coordinates right-of-way and traffic and operates an AASHTO-accredited testing lab.  

Curious to learn more?

Connect with an expert to find out how we delivered this project.

brunson_thad_v2.jpg

Thad Brunson

Transportation Engineer

Thad is a seasoned manager for construction, maintenance and traffic engineering, focusing on road and bridge project management, field engineering and inspection.

See more projects in this region

View All Projects
Aerial view of a highway interchange with overpass and surrounding greenery.
Tifton District, Georgia

20 years of roadway revolution with GDOT

RapidRide bus to West Seattle at a downtown stop, passengers walking past.
Seattle, Washington

Reimagining mobility along a key Seattle corridor 

Glowing digital envelopes on a dark background, symbolizing email communication.

Learn more about Complete Corridors

Find out how forward-thinking communities improve mobility, promote equity and enhance resiliency through our monthly newsletter.

Sign Up