Wis. Stat. § 345.31: Venue in traffic regulation actions.

Section 971.19 on place of trial in criminal actions applies to actions for the violation of traffic regulations and nonmoving traffic violations except that, in the case of a violation of an ordinance of a municipality which is located in more than one county, the action may be brought in any court sitting in that municipality even though in another county. As an alternative, the plaintiff may bring the action in the county where the defendant resides.