Traffic Regulation FAQ 5

Can a city or village police officer enforce traffic regulations on both sides of a road that serves as a boundary between a city/village and a township or between a city/village and a city/village?

Yes. Wisconsin Statute section 175.40(4) provides:
 
A peace officer whose boundary is a highway may enforce any law or ordinance that he or she is otherwise authorized to enforce by arrest or issuance of a citation on the entire width of such a highway and on the entire intersection of such a highway and a highway located in an adjacent jurisdiction. This subsection does not extend an officer’s jurisdiction outside the boundaries of this state.
 
Thus, a city or village police officer may enforce a traffic regulation on both sides of a road that serves as a boundary between the city/village and a township or as a boundary between the city/village and another city/village irrespective of whether the city or village boundary covers all or none of the boundary highway.