SR-154 at Redwood Road Interchange Design-Build
Owner: Utah Dept. of Transportation, Region 2
Lead Design: Wilson & Co. Engineers & Architects
Structural, Civil & MEP Engineer: Wilson & Co. Engineers & Architects
Geotechnical Investigation and Design: Gerhart Cole Inc.
Public Involvement: Somers-Jaramillo + Associates
General Contractor: Wadsworth Brothers Construction Co.
This design-build highway project improved the efficiency of the Bangerter Highway and Redwood Road corridors while delivering long-term value to the community. The project team widened Redwood Road to a six-lane urban arterial with dual left-turn lanes southbound and northbound; relocated and replaced major utilities, including a cell tower, irrigation channels, sewer lines and overhead power poles; and acquired right-of-ways and assisted with relocations, including nine full parcels and 26 partial parcels. The work also reconfigured the intersection at Redwood Road and Bangerter Highway to a single-point, urban interchange.
UDOT wanted to maintain current traffic flow for the nearly 70,000 vehicles a day throughout the project, but the tight, geometric profile of Redwood Road and significant right-of-way constraints made that difficult to do.
To address those challenges, crews realigned the collector roadway on the southeast corner of Bangerter Highway and Redwood Road and added a temporary, continuous-flow intersection to improve service during morning and evening peak traffic.
Innovative construction techniques cut overall costs and saved time. The project team built a three-span bridge with a 186-ft clear span to accommodate future widening and improvements on Redwood Road and reduce fill heights, thus saving UDOT nearly $1 million in construction costs.
This is also UDOT’s first highway project to use cell-crete—a cost-effective, eco-friendly pavement fill. The lightweight material provides a longer pavement life and improves long-term embankment performance,