What is an Ignition Interlock Device?

idAn ignition interlock device is a car breathalyzer that prevents a vehicle from starting if the driver has a breath-alcohol level that is above the state-allowed limit.

The device also requires random breath tests to be given while the car is running, to make sure that the driver is not drinking while driving. If alcohol is present, or a test isn’t taken, the device will sound your car horn and/or flash the headlights. An ignition interlock device is not capable of turning off a car while it is in motion.

All activity data is stored into the memory of the device. These results are then shared with your monitoring authority to ensure that you are in compliance with the program.

What steps are in a Ignition Interlock Device Program?

  • Installation
    The device is installed into your vehicle by a licensed technician
  • Usage
    Deliver breath samples when prompted by the device
  • Calibration
    Technician performs state-mandated calibration to ensure device accuracy
  • Reporting
    Data from device is downloaded and given to monitoring authorities
  • Removal
    Device is removed by technician when required by monitoring authorities

Additional state-specific information can be found here