In an effort to reduce the number of people who choose to drink and drive, many states - including Wisconsin - have adopted a number of laws and regulations over the decades to deter people from breaking the law. Most states now have in place some version of a program that requires the use of an ignition interlock device (IID) in the vehicles of DUI offenders. In Wisconsin, 2010 marked the first year mandatory IID requirements went into effect. IIDs are now required for all repeat OWI offenders, all chemical test refusals, and all first-time DUIs in which the driver’s blood alcohol concentration (BAC) is more than .15.

What is an Ignition Interlock Device?

An IID is a small electronic device that is wired into your vehicle’s ignition system. Before you are able to start the vehicle, you must blow into the device, which will then determine your BAC. In Wisconsin, if your BAC is over .02, the vehicle will not start. The device will allow you to have three attempts in five minutes for each requested breath sample. After a vehicle starts, the device will prompt you for other samples at various intervals while the engine is running. The date, time, and BAC of each and every sample is recorded and stored.