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Why Do States Require Ignition Interlock Devices?
Ignition interlock devices (IIDs) have become a critical tool in the fight against drunk driving over the past 15 years. These devices, which function similarly to breathalyzers, are installed directly into a vehicle’s ignition system and require drivers to blow into a mouthpiece before starting the car. If their blood alcohol concentration (BAC) is above the legal limit, the vehicle will not start. This simple yet effective mechanism has helped prevent countless instances of impaired driving.
In addition to initial breath tests, some IIDs also require rolling retests during the drive. These tests ensure that the driver, not another passenger, provided the initial sample. While the device won’t stop the car immediately, it records the event and alerts the driver to pull over. This data is then sent to the Department of Motor Vehicles (DMV) for monitoring.
As of 2020, all U.S. states have implemented laws requiring IIDs for individuals convicted of DUI or DWI offenses. New Mexico was the first state to adopt this policy in 2005, and since then, many others have followed. Some states apply these requirements only to repeat offenders, while others, like Connecticut, mandate IIDs for all DUI offenders, even first-time violators. States with all-offender laws have seen significant reductions in drunk driving incidents and related fatalities.
According to the Centers for Disease Control and Prevention (CDC), IIDs can reduce DUI offenses by up to 70%. MADD also reports that these devices lower repeat DUI offenses by 67% and reduce drunk driving deaths by 15%, making them one of the most reliable methods of preventing impaired driving.
Many states offer hardship licenses to those with a DUI, allowing limited driving privileges such as commuting to work or school. However, installing an IID is typically a prerequisite for obtaining such a license. In Connecticut, for example, drivers must install an IID and meet other requirements to reinstate their license after a suspension.
Massachusetts passed Melanie’s Law in 2005, increasing penalties for drunk driving and mandating the use of IIDs for repeat offenders. The law also introduced stricter rules for license suspension and reinstatement. Similarly, in Connecticut, drivers must keep an IID installed for a set period to regain full driving privileges.
Beyond just preventing drunk driving, IIDs collect valuable data about the driver’s behavior. They track the number of attempts to start the vehicle, monitor BAC levels during rolling tests, and may include GPS and cameras to ensure the correct person is providing the sample. However, this data isn’t always available in real time. Drivers must schedule regular maintenance every 30 to 90 days, during which the device is calibrated and data is uploaded to the DMV.
Failure to maintain the device can result in the loss of driving privileges. For those who need an IID installed, it’s important to follow all DMV procedures and schedule an appointment with a certified installer. If you're looking to get your license reinstated or need an IID installed, contact DaSilva’s Auto Body today to schedule your appointment.