Preliminary work on the Marquette Interchange reconstruction is scheduled to start in April. This involves rebuilding streets, bridges, and freeway approaches, but not the Interchange itself (that isn't scheduled to begin until mid-2005). The whole thing is expected to be complete in late-2008.
WisDOT has a website devoted to the project with all the details:
WisDOT Marquette Interchange Project
Photo of existing interchange:
Rendering of future interchange:
