The Marquette Interchange is a major freeway interchange in downtown Milwaukee, Wisconsin, located near Marquette University where Interstate 43, I-94, and I-794 meet. Originally built in the 1960s, the interchange underwent a total rebuild between 2004 and 2008, and was officially opened on August 19, 2008, after what was at the time the largest construction project in state history. During the early 2000s, U.S. Highway 41 (US 41) had followed I-94 through the interchange. This had changed when I-41 was designated in the Milwaukee area. US 41 now follows I-41 through the Zoo Interchange instead.