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How does an ignition interlock device work?

The leaps and bounds made with technological advances never cease to amaze. Whatever the industry, technology knows no bounds and will have an impact on every aspect. Advances in technology have allowed for ignition interlock devices to be a reliable means of checking for sobriety in convicted DUI/DWI drivers.

An ignition interlock device works by measuring a driver's blood alcohol content and disabling the vehicle's ignition if the driver's breath contain alcohol. Most ignition interlock devices will utilize a 'lock-out' period to prevent starting the vehicle in the event that the device detects more than a low threshold level of alcohol. The lock-out period typically gets longer with each failed test. Depending on the system in place, the device may have the ability to save information relating to a failed retest.

Essentials IIDs are put in place to prevent an intoxicated driver from getting behind the wheel to the point of disabling their vehicle. The average person does not need the approval of an IID device before starting their vehicle, however, IIDs are often implemented in instances when a person has been convicted of DUI/DWI and this is part of their sentencing or a condition of their parole. The devices can be ordered by a judge as temporary or as a more permanent situation.

If a person has not been accused or convicted of DUI/DWI, then they generally do not need to worry about ignition interlock devices. However, for those facing charges related to DUI/DWI, one should be aware of the potential consequences that could result from a conviction. IIDs are fairly common today, as they do seem to be a good balance of public safety and freedom for the individual. However, it's certainly not ideal to a person to be obligated to check their BAC levels before starting up their vehicle.

If you have been charged with a DUI and fear you may be required to install an IID on your vehicle, don't hesitate to contact an attorney to discuss your best defense option.

Source: FindLaw, "Ignition Interlock Devices," Accessed Nov. 28, 2017

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