What is an ignition interlock device?
Quick Answer
An ignition interlock device is a breathalyzer installed in a vehicle that prevents the engine from starting if alcohol is detected in the driver's breath. Courts often require them for DUI offenders. The driver must blow into the device before starting and periodically while driving. Cost is typically paid by the offender.
Explanation
An ignition interlock device is a breathalyzer installed in a vehicle that prevents the engine from starting if alcohol is detected in the driver's breath. Courts often require them for DUI offenders. The driver must blow into the device before starting and periodically while driving. Cost is typically paid by the offender. Understanding this concept is essential for safe driving and will help you answer similar questions on the DMV written test.
Why This Matters on the DMV Test
Questions about Safe Driving are among the most common on the permit test. Knowing the correct answer helps you pass your exam and stay safe on the road. Most states require a score of 70–83% to pass.
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