Most states have titling and registration laws that require residents to title and register their cars in the state—and for new residents of the state to do so within some period of time, such as 30 days. Some states require titled cars to pass a comprehensive safety inspection. And some states also require cars owned by residents of certain counties to pass an emissions test/inspection designed to improve air quality in more densely populated counties.
In Wisconsin, residents are required to title and register their vehicles with the Wisconsin Department of Transportation (WisDOT). New residents must title and register their vehicles within 60 days of establishing residency. Wisconsin does not have a statewide vehicle safety inspection program; however, an emissions test is required for vehicles kept in certain counties with higher populations and air quality concerns. These counties include Kenosha, Milwaukee, Ozaukee, Racine, Sheboygan, Washington, and Waukesha. The emissions test must be passed before a vehicle can be registered or when registration is renewed, and it is typically required every two years. The aim of the emissions testing program is to maintain air quality standards by ensuring that vehicles meet emission standards set by the federal government and the state.