“When you start your vehicle, you have to blow into a mouthpiece that’s connected to the ignition interlock device, sometimes called an in-car breathalyzer. The interlock device will then measure your breath alcohol concentration (BrAC) and automatically determine whether your BrAC is low enough to allow the car to start.”
“Ignition interlock devices and drunk driving laws vary from state to state. After a DUI, you may be able to get your license reinstated by having an ignition interlock device installed in your car.”
“To find out if you are required or eligible for an ignition interlock device, you should review any documents you received after your DUI/DWI conviction, such as paperwork from the DMV or DOT.”
“In many states, interlock devices are offered as an alternative to license suspension and may be mandatory for some offenses. All states have some variation of an ignition interlock law. The interlock device may be required from six months to several years, depending on the severity of your offense and your history.”