How does an Ignition Interlock device work?
Before starting the vehicle, the driver must blow into the device. If the recorded blood alcohol concentration (BAC) is above the pre-set limit, the vehicle will not start. Once the vehicle is started, the interlock device requires random breath samples at pre-set times. If a breath sample is not provided or if the BAC exceeds the limit, the device will issue a warning, record the event, and activate specific alarm systems (i.e., lights flashing, horn honking, etc.) until the ignition is turned off.
