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When is an Ignition Interlock Device required?

On Behalf of | Mar 28, 2025 | Drunk Driving

Driving under the influence poses serious risks to public safety, and Maryland law takes DUI offenses seriously. One measure to prevent repeat offenses is the ignition interlock device (IID). This tool helps ensure drivers do not operate their vehicles while impaired.

What is an Ignition Interlock Device (IID)?

An ignition interlock device is a small, sophisticated breathalyzer installed in a vehicle. The driver must blow into the device before starting the engine. If the IID detects a blood alcohol concentration (BAC) above a pre-set limit, it prevents the vehicle from starting.

The device also requires periodic retests while the vehicle is in operation to ensure continued sobriety. IIDs record data, including BAC readings, which authorities can review to ensure compliance.

Why are IIDs required?

Maryland requires ignition interlock devices for drivers convicted of certain DUI offenses. Under implied consent laws, first-time offenders with a BAC of 0.08% or higher, repeat offenders, and drivers who refuse a breath test may face IID requirements.

Courts may also mandate IIDs as part of probation or plea agreements. An IID aims to ensure that drivers remain sober behind the wheel, thereby reducing the risk of repeat DUI offenses and enhancing public safety. By using IIDs, Maryland promotes responsible behavior among drivers.

Fighting DUI charges

If you find yourself charged with a DUI in Maryland, you may want to seek help from a legal professional. They can help you understand your rights and explore options like plea agreements or diversion programs. Remember, compliance with all legal requirements, including installing an IID if mandated, is essential to regaining your driving privileges and moving forward responsibly.