Ignition interlock devices (also known as Breath Analyzed Ignition Interlock Devices, or BAIIDs) have been in use for more than 25 years to prevent drivers with an elevated breath alcohol concentration (BrAC) from operating a vehicle. In the past decade, they have been adopted as part of an overall DWI control strategy. Ideally, ignition interlock programs are used in conjunction with treatment programs.
Increasing numbers of states mandate or allow a court to order installation of an interlock device on the vehicles of DWI/DUI offenders. These orders may be as a condition of bond or probation, or an alternative to license suspension or vehicle impoundment. Six Canadian provinces and 44 American states have legislation that mandates or permits ignition interlock devices. Some programs fall under the administrative authority of licensing agencies, while others are under the authority of the courts. Duration, eligibility, and requirements for reporting and monitoring all vary from jurisdiction to jurisdiction.
Research shows a 40 percent to 95 percent reduction in repeat DWI offenses by drivers while using interlocks. Reducing the DWI rate is critical to preventing alcohol-related crashes and fatalities.
