Quinn provided quality assurance management for this $59 million project to build a diverging-diamond interchange (DDI) on U.S.15 at I-66. This DDI was the first to be built in Northern Virginia, and the project was completed on time and on budget.
The purpose of the project was to relieve congestion, enhance public safety, operations and capacity, and accommodate forecasted traffic demand in the area. As part of this diverging-diamond interchange, the project included constructing two longer bridges to carry U.S. 15 over I-66 with two crossover intersections; ramp improvements (including a spur ramp to ease traffic flow from westbound I-66 to northbound U.S. 15 to westbound Heathcote Boulevard); improvements on U.S. 15 from just north of the railroad tracks to just south of Heathcote Boulevard; wider intersections and additional turn lanes on U.S. 15 at Heathcote Boulevard and Route 55, and a 10-foot-wide shared-use path on the east side of U.S. 15 for pedestrians and bicyclists.
In addition to the QAM, the Quinn team included a lead quality assurance inspector and a testing technician.
