Maybe you have heard of an acronym IID, these letters stand for an Ignition Interlock Device, which is a device that is installed in the vehicle and requires the driver to breath into it to check the alcohol level in the blood. If the level is not satisfactory, the vehicle will not start. This way a driver that is intoxicated will not be able to drive the vehicle, thus will avoid a DUI/DWI/OUI violation.

Which States Require Ignition Interlock Device?

According to some studies, ignition interlock device has helped reduce recidivism of DUI offences. Most probably this was the main reason why the National Highway Traffic Safety Administration issued model guidelines and encouraged all US States to adopt the laws requiring DUI offenders to use interlocks for a certain minimal period of time. As a result all 50 States now have some kind of law regarding ignition interlock devices, some have mandatory requirements for all offences (23 States at the moment) and some have strong incentives in the case of first conviction with obligation for next offences.

What Are Common Regulations in the US States?

Since almost all 50 States have different laws regarding IID usage, we will try to summarize most common regulations so that you can orient yourself a little easier for each State. It will also help you find the laws more easily.

The States that require installment of IIDs in your vehicle after the first conviction of DUI violation have different regulation for BAC (blood alcohol concentration) levels.

The first group of States (Alabama, Alaska, Arizona, Arkansas, California (Pilot Program for four Counties), Colorado, Connecticut, Delaware, Hawaii, Illinois, Kansas, Louisiana, Maine, Mississippi, Missouri, Nebraska, New Hampshire, New Mexico, New York, Oregon, Tennessee, Texas, Utah, Virginia, Washington and West Virginia) require IID to be installed on first conviction if the BAC was 0.08 or more.

The second group of States (Florida, Kentucky, Maryland, New Jersey, North Carolina, Oklahoma, Rhode Island, South Carolina, Wisconsin and Wyoming) require IIDs if the BAC was 0.15 or more for the first conviction.

Some States have different from abovementioned regulations: Iowa demands IIDs installed if first time offenders had 0.10 or greater BAC level. Michigan regulation is 0.17 BAC, Minnesota – 0.16 BAC level and Nevada 0.18 concentration or more.

The States that have mandatory IID for vehicles for second conviction are less in amount. These are – Georgia, Idaho, Indiana, Massachusetts, Montana, Ohio and Pennsylvania.

California and North Dakota have discretionary regulations for any offenders to install Ignition Interlock Devices.

Three remaining States – DC, South Dakota and Vermont have their own special programs that are in place to create incentives and voluntarily enable IID installment. For instance, District of Columbia lets any offender make a choice to take interlock and will let him shorten the license suspension period; South Dakota has a 24/7 Sobriety Program, which means that driver by the order of the court will have to take tests for certain controlled substances and install IID in the vehicle; as for Vermont, it lets the driver install IIDs if he or she wants to drive non-commercial vehicles after serving mandatory part of the suspension, this means that a driver has Restricted License with the condition that Ignition Interlock is installed. These three States therefore have opted to promote using Ignition Interlock Devices.

Apart from State laws, there are number of civil movements that are working on promoting usage of IIDs or advocate for adoption of legal duties to have ignition interlock devices for all drunk drivers. These movements claim that the demand comes from safety necessities.

How Long the Ignition Interlock Device Should Be Installed?

Different States have different period obligating a driver to have the device in the vehicle. Usually, for first conviction there is a 6 month requirement, for second – a one year requirement, for following offences the period is raised up to either 2 or 5 years for 3rd conviction and up to 5 or 10 years for 4th conviction. Some states have lesser requirements, or have requirements based on the level of blood alcohol concentration. It is hard to generalize all requirements, which is why it is highly recommended to check the relevant State regulations to have detailed information.

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