Wis. Stat. § 84.1052: Michael G. Ellis Memorial Interchange.

(1) The department shall designate and, subject to sub. (2), mark the interchange of I 41, USH 10, and STH 441 in Winnebago County as the Michael G. Ellis Memorial Interchange.

(2) Upon receipt of sufficient contributions from interested parties, including any county, city, village, or town, to cover the costs of erecting and maintaining markers for the interchange specified in sub. (1) to clearly identify the designation of the interchange as the “Michael G. Ellis Memorial Interchange,” the department shall erect and maintain the markers. No state funds, other than from the receipt of contributions under this subsection, may be expended for the erection or maintenance of the markers.