Wisconsin Statutes Vehicles (Ch. 340 to 351) § 349.07. Authority to designate through highways

(6)(a) Nothing in this section shall prohibit local authorities from placing additional stop signs on the roadway or temporary school zoning warning signs or temporary stop signs in the roadway at school crossings during periods of daylight when school children are using such crossings if such signs do not physically obstruct traffic.

(b) Nothing in this section shall prohibit local authorities from placing temporary stop signs in the roadway at intersections or crosswalks for limited periods of time if the local authorities deem it necessary for the public safety and if the signs do not physically obstruct traffic.

(7)(a) The department may, when it deems necessary for the public safety, by order provide for the installation of yield signs on state trunk highways and connecting highways, and the governing body of any city, or county, may by ordinance or resolution provide, when it deems it necessary for the public safety, for the installation of yield signs on any through highway which has been so declared under sub. (3) and under its exclusive jurisdiction to regulate merging traffic movements and conflicting movements occurring within the intersection of 2 or more highways. Yield signs shall not be used in lieu of stop signs where a highway directly crosses a through 2-way highway.

(b) The governing body of any town, city, village or county may by ordinance or resolution provide for the installation of yield signs at any intersection over which it has exclusive jurisdiction, but if the intersection is part of a through highway such yield signs can be installed at such intersections only as provided in par. (a).