Wisconsin State Law Library

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Drunk & Impaired Driving

Impaired driving laws in Wisconsin "A driver is under the influence when their ability to operate a motor vehicle is impaired. A person's ability to operate a motor vehicle is impaired if he or she is less able to safely control the vehicle because of the consumption of alcohol or controlled substances. This means that if a police officer pulls you over and determines that you are impaired by alcohol and/or any other drug, you could be arrested and prosecuted ." (WisDOT)

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Top Sources
Wisconsin Statutes - Reckless and Drunk Driving
Wisconsin Statutes - Ignition Interlock Devices
Wisconsin Statutes - Tests for Intoxication

Popular questions

I need the forms for the Ignition Interlock Device

MCLL users can obtain the forms in Room 117 of the Safety Building (Criminal Clerk of Courts). The half price IID form is on the Court’s website. Other users can request a copy of a form from another by asking a librarian for help.

How long will my DUI show up on CCAP?

The Library has two sources that may be helpful. The first is the Wisconsin Attorney’s Desk Reference (KFW2481 .W571) which includes the Statutes of Limitation, or Wisconsin Supreme Court Rule 72.


Additional statutes, regulations & opinions may apply to your specific situation. Search the Wisconsin statutes & administrative code online.


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