INTERLOCK F.A.Q.

An ignition interlock is more formally known as a BAIID, or Breath Alcohol Ignition Interlock Device. It is a breathalyzer unit that is wired into the ignition system of a vehicle, and is designed to prevent the vehicle from starting until a passing breath test is delivered. The BAIID is equipped with a data chip which records the date, time, and alcohol concentration of each test taken, as well as signs of tampering and circumvention. It is essentially a form of alcohol immobilization and is utilized to prevent the recurrence of drinking and driving.

The driver must take a deep breath of air and blow into the device for approximately 5 seconds. Each BAIID manufacturer may require different blowing techniques to ensure it is a human delivering a test, rather than an alternate air source. Once the sensor analyzes the breath alcohol concentration (BAC) of the breath sample, it will either give a pass or fail signal. Only a passing test will allow the driver to start the vehicle. Additionally, most jurisdictions require a running retest, which means the BAIID will randomly signal the user to blow again as they are driving. This is to ensure that the same person who delivered the initial test is also the same person driving the vehicle, and also prevents drinking once the vehicle has been started. The system must be serviced regularly, at which time the information stored on the unit is retrieved and the sensor is recalibrated. Depending on the company and jurisdiction requirements, service is usually scheduled at 30 or 60 day intervals.

The BAIID system was designed to prevent drinking and driving. Many states have passed legislation requiring the use of an approved ignition interlock device as part of a restricted driver license for individuals who have had multiple drinking and driving convictions. District and Circuit courts also utilize the interlock as a form of electronic probation, alcohol immobilization, a pre-trial bond condition, or for first-time offender programs. Interlock providers and governing authorities work closely together to monitor vehicle activity as well as a persons continued abstinence from alcohol. Most of the interlocks installed are ordered by the state or court, although some people and companies install them voluntarily to prevent a second drinking and driving offense, control underage drinking and driving, or to prevent employees from driving company vehicles while under the influence.

While installation fees may vary by company, most BAIID systems cost between $2.00 - $3.00/day. Please contact one of the approved interlock providers listed on this website for the most current prices and service locations available in your area.