DALLAS HIGH FIVE INTERCHANGE
The $288 million Dallas High Five Interchange project was a five-level interchange at the intersection of US 75 and IH 635, two of the busiest highways in North Texas, with a daily traffic count of 500,000 vehicles per day. The plans for the new interchange included 43 bridges, 710 columns, a total of 10 main lanes and four barrier-separated high-occupancy lanes on I-635, a total of eight main lanes on US 75, and a reversible high-occupancy lane connecting the two highways. TxDOT’s largest project at the time, the Dallas High Five Interchange improved driver safety, air quality, and local access. It also increased traffic capacity and provided flexibility to meet future growth.
As the lead contractor, Zachry took charge of all construction activities, including roadway, bridge erection, drilled shafts, earthwork, drainage, pavement, and retaining walls. Zachry set up an on-site precast yard to house the concrete segments needed for the project. Zachry self-performed more than 59 percent of this complex interchange project and reduced the total number of daytime lane closures and the number of major traffic shifts the project required, allowing the project to be built safely and delivered one year ahead of schedule.
The American Public Works Association named the High Five project a Public Works Project of the Year, and the AGC of Texas National Partnership for Highway Quality Control recognized Zachry with an Outstanding Partnering Achievements award.