Dane County Regional Airport, also known as Truax Field, is the primary commercial airport serving Madison, Wisconsin, and the surrounding Dane County region. It handles millions of passengers annually and serves as a key transportation hub for state government travelers, University of Wisconsin visitors, and business passengers. The airport shares its runways with the Wisconsin Air National Guard's 115th Fighter Wing, which operates F-16 Fighting Falcons from the adjacent Truax Field military installation. This joint civil-military use is a defining characteristic of the facility. MSN has undergone significant terminal improvements in recent years to modernize passenger facilities and expand gate capacity, reflecting steady growth in commercial air service to and from Madison.