What is the primary function of an interlock device?

The primary function of an interlock device is to prevent the engine from starting if alcohol is detected. This device is designed to enhance safety by ensuring that individuals who have consumed alcohol cannot operate a vehicle, thereby reducing the risk of DWI (Driving While Intoxicated) incidents. Typically, the driver is required to blow into the device, and if the breath alcohol concentration exceeds a preset limit, the engine will not start. This mechanism is a critical tool used in DWI rehabilitation programs and legal consequences for offenders. By preventing operation under the influence, interlock devices play a significant role in promoting responsible driving and protecting public safety.