Wis. Stat. § 118.10
Any school board may organize school safety patrols and, with the permission of the parents, appoint pupils as members thereof for the purpose of influencing and encouraging the other pupils to refrain from crossing public highways at points other than at regular crossings and for the purpose of directing pupils not to cross highways at times when the presence of traffic would render such crossing unsafe. Nothing in this section authorizes or permits the use of any safety patrol member for the purpose of directing vehicular traffic, nor may any safety patrol member be stationed in that portion of the highway intended for the use of vehicular traffic. No liability shall attach to the school district or any individual, school board member, school district administrator, teacher or other school authority by virtue of the organization, maintenance or operation of a school safety patrol organized, maintained and operated under this section.
Wis. Stat. § 118.10