Wis. Stat. § 84.101

The department shall maintain all markers that designate any state trunk highway or bridge on the state trunk highway system as a memorial that is associated with the armed forces or any branch or unit of the armed forces, any specific soldier or soldiers, any armed forces award or honor, or any war or armed conflict, that is otherwise military in nature, or that is designated under s. 84.10295, and, notwithstanding ss. 84.1028 (2), 84.1029 (2), 84.1031 (2), 84.1034 (2), 84.1036 (2), 84.1039 (2), and 84.1041 (2), the department shall bear the cost, in an amount not to exceed a total of $2,000 per year on a statewide basis, of such maintenance and shall only perform maintenance under this section in amounts above that sum to the extent that the department has received local or private funding for such maintenance.