Video: Milwaukee Zoo Interchange

Traversing the intersection of I-94 and I-41, the Zoo Interchange in Milwaukee, Wisc., is the highest volume interchange in the state, withstanding more than 350,000 vehicles per day. The reconstruction of the interchange is tagged at an overall cost of $1.7 billion. Due to its massive scale, the project schedule was let in phases, or cores, by which the Wisconsin Department of Transportation could manage the scale of things while keeping the interchange viable during construction.